Though DC tend to hold the crown for the best use of their many, many alternate universes, when it comes to Marvel, Spider-Man is the only one who can really give them a run for their money.
The wall-crawler has a troff of unique, alternate counterparts that span the entire Marvel multiverse, and with Spider-Man: Into the Spider-Verse set to spotlight these characters on the big screen come December, True Believers are going to have a ball.
So highly regarded are these Spider-Men that two (Miles Morales and Spider-Gwen) have already made the leap to Marvel's main 616 continuity. They're both now stars in their own right, with Miles having even eclipsed Peter in the comics as of late, but they're nowhere near as wild as some of these other alternate Spider-Men.
Some sport six arms, others just the usual two, and some have even opted to shirk their great responsibility altogether. There are so many variants of the identity in the comics that there have even been Spider-villains to compete with the heroes. It's a crazy, multi-dimensional world, and with it being such a crazy, multi-dimensional world, the only surprise should be that there’s scarcely a dull one to be found.