So I've decided that what my Karador, Ghost Chieftain deck needs is more ways to flood the board with stuff, but I'm going off the self-imposed restriction of "no noncreatures" and "no dredge strategies". I want to just play out the deck and only rely on the commander to solve problems the cards in hand can't, essentially reducing the impact that graveyard hate usually has on this commander.
No non-creatures makes it very tough, since most creatures that produce creatures produce tokens. Wild Pair and Lurking Predators would probably work well in the deck if you decide to loosen up on your "no non-creatures" stance.
While it's a bit of a detour, Corpse Connoisseur into Karmic Guide/Phyrexian Delver might do the trick. It kind of circumvents the whole "From library" thing by taking a detour, but it works.
Also, if you have any creatures that search your library, Panglacial Wurm can be taken along for the right for a paltry sum of 7 mana.
Chandra, Torch of Defiance - Oops! All Chandras. Prime Speaker Zegana - Draw for Power. Pir & Toothy - Counterpalooza. Arcades, the Strategist - Another Brick in the Wall. Zacama, Primal Calamity - Calamity of Double Mana. Edgar Markov - Vampires Don't Die. Child of Alara - Dreamcrusher.
Yisan, the Wandering Bard is one of the more notorious examples of creatures that do this. He's probably more at home in his own EDH deck than as part of a 99, but you can make him work with a good curve. If your playgroup doesn't pay much attention to the ban list, you can try to get away with Protean Hulk.
So far I've found Genesis Hydra, Thicket Elemental, Enlisted Wurm, and Woodland Bellower, but I'm having difficulty finding anything else that can help me barf creatures from my deck into play. Are there any big ones that I'm missing here?
Is the best at this, but it requires precise deck building
8.RG Green Devotion Ramp/Combo 9.UR Draw Triggers 10.WUR Group stalling 11.WUR Voltron Spellslinger 12.WB Sacrificial Shenanigans
13.BR Creatureless Panharmonicon 14.BR Pingers and Eldrazi 15.URG Untapped Cascading
16.Reyhan, last of the Abzan's WUBG +1/+1 Counter Craziness 17.WUBRG Dragons aka Why did I make this?
Building: The Gitrog Monster lands, Glissa the Traitor stax, Muldrotha, the Gravetide Planeswalker Combo, Kydele, Chosen of Kruphix + Sidar Kondo of Jamuraa Clues, and Tribal Scarecrow Planeswalkers
Also, if you have any creatures that search your library, Panglacial Wurm can be taken along for the right for a paltry sum of 7 mana.
(W/U)(B/R)GForm of Progenitus, Shape of a Scrubland
BRGJund Tokens with Prossh, the Magic Dragon Foil
URGAnimar, the RUG CleanerFoil
RRRFeldon of the Third Path 2.0 Foil
BG(B/G)Not Another Meren DeckFoil
UR(U/R)Mizzix, Y Control and X Burn Spells
(W/U)(B/R)GHarold Ramos - The 35 Foot Long Twinkie (In +1/+1 counters)
UB(U/B)Dragonlord Silumgar