From my experience, the best resurrection targets are:
AmazingGreenwarden of Murasa...because he's free (i.e., gets back the reanimation spell)
GreatPlated CrusherBreaker of ArmiesPlated Crusher is the most reliable creature in the game. It always works. It's hexproof, trample, out of languish range. Whatever you want, it does. Breaker of Armies is the best creature against decks with a lot of creatures, but no reliable removal spells - think Elves and Aristocrats. You get to wrath their board - possibly multiple times - and they never come back. He's not always the right creature, but when he is, he's the best.
GoodLinvala, the PreserverSire of StagnationKozilek, the Great DistortionUlamog, the Ceaseless HungerLinvala is the best possible target against aggro, Sire is the best possible target against Ramp. Kozilek and Ulamog are generically good - usually either Plated Crusher or Breaker of Armies would be better for the specific scenario, but they're always second best. Ulamog's gotten a lot worse with all the exiling and tapping and bouncing going around. Bonus points to Sire for being naturally castable on curve.
AcceptableAlhammarret, High ArbiterGaea's RevengeOmnath, Locus of RageEach of these is good for a specific situation that rarely comes up. Alhammarret is good against a WBx control deck that somehow only has one removal spell in hand. Gaea's Revenge is good against mono-U mill. Omnath is good against people with no removal spells. But for almost all of these cases, Plated Crusher would do nearly as good a job, while not being terrible the rest of the time.
Anything ElseEmeria ShepherdGood in a white version, but not for Sultai.