I think for fogs I'd look more toward creature-based ones like Spike Weaver before Constant Mists in Omnath. The advantage is mainly that you can tutor for it, but you can set up a softlock with it if you play Temur Sabertooth (I do).
I would like to support Dimir House Guard, Kalitas, Traitor of Ghet, and Smothering Abomination. The combination of useful sac outlet and tutor (and sword-holder in a pinch) makes Dimir House Guard a fantastic addition to a lot of decks. Kalitas has two relevant creature types and functions as a life buffer, graveyard hate, token generator, and a sac outlet (albeit an expensive and conditional one) all at once. Smothering Abomination is less versatile than the other two, but the card is very strong as a draw engine and sac outlet.
I would also like to nominate Fleshwrither, Dimir House Guard's weirder brother. While they tutor for the same CMC and House Guard's second ability is very useful, Fleshwrither upgrades into a better creature (Crypt Ghast, Erebos, God of the Dead, and Disciple of Bolas, for example, and that's just mono-black) and can be reanimated to do so repeatedly, hitting any relevant "dies" triggers in the process.
You also seem pretty light on card draw, I recommend Tormenting Voice/Wild Guess and Outpost Siege. I like Commune with Lava a lot too, but it's iffier. Sin Prodder is better here than in most decks, but I still don't think it's worth letting your opponents have the choice.
Mana Confluence/City of Brass/Barbarian Ring are secret tech to manage your life total so that Hidetsugu + doubler doesn't kill you. Fetchlands serve the same purpose, and I found myself quite fond of Pyrohemia for similar reasons.
I run it in Animar and it usually draws 6-9 cards, which for UUGG is a pretty great deal.
As a general I'm actually more afraid of this than Momir Vig now that Prophet of Kruphix is banned. Set up a blink engine and it's pretty easy to draw a ton of cards and softlock everyone.
Honestly, I'd just give my opponent the land. If it's not on-color then they aren't doing anything with it and if it is then it's not that big a deal, since they already have enough mana to cast an 8-drop requiring UBBR.
This whole cycle are all just on the edge of playable (the rest are Godsire, Sphinx of the Steel Wind, Hellkite Overlord, and Empyrial Archangel). Archangel can do work in Bant pillowfort; the Sphinx is a solid finisher in a more casual Esper artifacts deck; Godsire is, naturally, a great fit for Mayael the Anima; and Hellkite Overlord is an acceptable haste/regeneration enabler for Scion of the Ur-Dragon. In fact, Prince of Thralls is probably the worst of them in EDH for similar reasons to Athreos, God of Passage. Your opponents will just take the bolt most of the time, and you're paying 8 mana across three different colors to make it happen.
EDIT: Whoops, turns out the Esper part of this cycle is Sphinx Sovereign, not Sphinx of the Steel Wind. I don't recall ever seeing this card before, which isn't surprising because it looks really bad.
I believe the general you're looking for is Wort, the Raidmother. There are plenty of Wort decks kicking around in the database, and if you're interested in this I suggest you take a look. For creature-based draw you're much better off with Shamanic Revelation and/or Collective Unconscious in a token/spellslinger deck.
EDH seems like a great format for giant tribal. I was always disappointed with it in 60-card casual because it takes so long to get rolling (and obviously they're unplayable in a format like Modern), but with all the extra time and ramp effects they could be pretty fun and decently strong with enough support.
I do think this card is overrated, since in a lot of decks it's effectively a mana rock that does nothing until you have 7 mana, but late in the game or in a green deck this is terrifying.
There was a thread discussing how to abuse this as a PDH general a while back, it seems pretty good there. In general I like cards that try to minimize the card disadvantage inherent in auras.
I would also like to nominate Fleshwrither, Dimir House Guard's weirder brother. While they tutor for the same CMC and House Guard's second ability is very useful, Fleshwrither upgrades into a better creature (Crypt Ghast, Erebos, God of the Dead, and Disciple of Bolas, for example, and that's just mono-black) and can be reanimated to do so repeatedly, hitting any relevant "dies" triggers in the process.
It's eating a scarecrow.
Kavu Primarch could be a decent beater in PDH token decks, a 4-mana (or potentially free) 7/7 is no joke.
You also seem pretty light on card draw, I recommend Tormenting Voice/Wild Guess and Outpost Siege. I like Commune with Lava a lot too, but it's iffier. Sin Prodder is better here than in most decks, but I still don't think it's worth letting your opponents have the choice.
Mana Confluence/City of Brass/Barbarian Ring are secret tech to manage your life total so that Hidetsugu + doubler doesn't kill you. Fetchlands serve the same purpose, and I found myself quite fond of Pyrohemia for similar reasons.
As a general I'm actually more afraid of this than Momir Vig now that Prophet of Kruphix is banned. Set up a blink engine and it's pretty easy to draw a ton of cards and softlock everyone.
EDIT: Whoops, turns out the Esper part of this cycle is Sphinx Sovereign, not Sphinx of the Steel Wind. I don't recall ever seeing this card before, which isn't surprising because it looks really bad.