I got Golos too and tweaking it also, here is my list it is not so much focus on lands though but it can go toe to toe with my playgroup using Urza, Godo, Prosh, and Breya.
At first I based my concept on my old deck Jhoira of the Ghitu (I was so happy I thought Im getting a Jhoira of the Ghitu 2.0) exploiting Golos' activated ability and arranging the top deck with tutors and racks and putting Obliterate and some Eldrazi on top deck for the win. But as the more I played with Golos I shifted my concept to more like Thrasios deck abandoning the Obliterate route to Seedborn Muse.
You can consider to add these cards:
Lands *Remember each of this can be fetched by Golos* Alchemist's Refuge - This is the heart of every Golos deck it gives you flash Glacial Chasm - No damage and attack shenanigans will kill you, good with Crucible of worlds, Ramunap Excavator, and Lord Windgrace Phyrexian Tower - Sac engine for Golos if you need to recur him if no blink available, also protects Golos from steal shenanigans Homeward Path - One word, Gilded Drake Cascading Cataracts - Converts colorless mana to 5 colors for Golos' activation Sunscorched Desert - Combo with Animate Dead + Worldgorger Dragon
Blinks Soulherder - This guy is good, grants you additional land (any land!)per turn with Golos plus it grows every turn. Aminatou, the Fateshifter - About to try this as soon as I get a copy of it, but seeing how good Soulherder I think this is good arranges top deck and blinks.
Essentials Seedborn Muse - combine with Alchemist's Refuge will grant you activation for each of your opponents! It's like a free 3 extra turn on 3 opponents! Wilderness Reclamation - also good gives you a semi Seedborn Muse effect Vorinclex, voice of hunger - More mana, more activation, slows your opponents. Mirrari's wake and Zendikar Ressurgent is also good.
1 Golos, Tireless Pilgrim
Land 32
4 Snow-covered Forest
1 Snow-covered Plains
1 Snow-covered Swamp
1 Snow-Covered Mountain
1 Snow-Covered Island
1 Overgrown Tomb
1 Stomping Ground
1 Breeding Pool
1 Temple Garden
1 Steam Vents
1 Godless Shrine
1 Glacial Fotress
1 Dragonskull Summit
1 Sunpetal Groove
1 Rootbound Crag
1 Botanical Sanctum
1 Exotic Orchard
1 City of Brass
1 Command Tower
1 Phyrexian Tower
1 Bojuka Bog
1 Sunscorched Desert
1 Strip Mine
1 Nykthos, Shrine to Nyx
1 Homeward Path
1 Cascading Cataracts
1 Alchemist's Refuge
1 Blast Zone
1 Ancient Tomn
Ramp 22
1 Sol Ring
1 Mana Vault
1 Birds of Paradise
1 Elves of Deep Shadow
1 Search for Tommorow
1 Avacyn's Pilgrim
1 Elvish Mystic
1 Simic Signet
1 Golgari Signet
1 Boros Signet
1 Gruul Signet
1 Paradise Druid
1 Rattleclaw Mystic
1 Sylvan Caryatid
1 Farseek
1 Wood Elves
1 Springbloom Druid
1 Cultivate
1 Kodama's reach
1 Chromatic Latern
1 Hunting Wilds
1 Skyshroud Claim
1 Scheming Symmetry
1 Mystical Tutor
1 Gamble
1 Merchant Scroll
1 Neoform
1 Congregation at Dawn
1 Eldritch Evolution
1 Final parting
Mana doubler/Mana sinks 4
1 Doubling Cube
1 Vorinclex, Voice of Hunger
1 Thrasios, Triton Hero
1 Biomancer's Familiar
Land Shenanigans 3
1 Soulhereder
1 Seedborn Muse
1 Wilderness Reclamation
Removals/Control 10
1 Nature's Claim
1 Beast Within
1 Chaos Warp
1 Karn, the Great Creator
1 Windgrace's Judgement
1 Frilled Mystic
1 Pact of Negation
1 Rewind
1 Cyclonic Rift
1 In Garruk's Wake
Support 6
1 Crucible of Worlds
1 Glacial Chasm
1 Leyline of Anticipation
1 Mystic Remora
1 Brainstorm
1 Reap the Past
Biggies 7
1 Kozilek, Butcher of Truth
1 Kozilek, The Great Distortion
1 Ulamog, The Ceasless Hunger
1 Ulamog, Infinite Gyre
1 Emrakul, The Promised End
1 Void Winnower
1 Maelstrom Wanderer
1 Animate Dead
1 Worldgorger Dragon
1 Deadeye Navigator
1 Peregrine Drake
1 Bolas' Citadel
1 Sensei's Divining Top
1 Aetherflux Reservoir
At first I based my concept on my old deck Jhoira of the Ghitu (I was so happy I thought Im getting a Jhoira of the Ghitu 2.0) exploiting Golos' activated ability and arranging the top deck with tutors and racks and putting Obliterate and some Eldrazi on top deck for the win. But as the more I played with Golos I shifted my concept to more like Thrasios deck abandoning the Obliterate route to Seedborn Muse.
You can consider to add these cards:
Lands
*Remember each of this can be fetched by Golos*
Alchemist's Refuge - This is the heart of every Golos deck it gives you flash
Glacial Chasm - No damage and attack shenanigans will kill you, good with Crucible of worlds, Ramunap Excavator, and Lord Windgrace
Phyrexian Tower - Sac engine for Golos if you need to recur him if no blink available, also protects Golos from steal shenanigans
Homeward Path - One word, Gilded Drake
Cascading Cataracts - Converts colorless mana to 5 colors for Golos' activation
Sunscorched Desert - Combo with Animate Dead + Worldgorger Dragon
Blinks
Soulherder - This guy is good, grants you additional land (any land!)per turn with Golos plus it grows every turn.
Aminatou, the Fateshifter - About to try this as soon as I get a copy of it, but seeing how good Soulherder I think this is good arranges top deck and blinks.
Essentials
Seedborn Muse - combine with Alchemist's Refuge will grant you activation for each of your opponents! It's like a free 3 extra turn on 3 opponents!
Wilderness Reclamation - also good gives you a semi Seedborn Muse effect
Vorinclex, voice of hunger - More mana, more activation, slows your opponents. Mirrari's wake and Zendikar Ressurgent is also good.
Win Con
Congregation at Dawn - Tutors 3 creatures to top. Peregrine Drake + Deadeye Navigator + Grand Abolisher or Frilled Mystic for the win. Infinite mana.
Animate Dead + Worldgorger Dragon - Gives you infinite mana, also auto win if you tutored Sunscorched Desert out with Golos.