Doctor Strange in the Multiverse of Madness gave us a few iterations of the Wizard, as our original Doctor Strange (Earth 616) traverses the multiverse to seek his own help. Being able to see different versions of yourself could give a real individual insight into who they are, this variant is what you could have been had the circumstances been different.
What director Sam Raimi has given us are all versions of Strange that failed in one way or another. There was Defender Strange, who was willing to sacrifice young America Chavez. Supreme Strange had used The Darkhold to defeat Thanos and had become corrupted. Sinister Strange, the one who had destroyed his own universe and was willing to trade the Darkhold for Christine Palmer from Earth-838, then there was Zombie Strange, who technically isn’t a new variant but just Defender Strange’s corpse being a puppet by our Strange.