If you like Proteus, you might want to check out EXILES. During House of M, Kevin McTaggart and Moira were both alive. Although Moira ended up killing herself (to prevent Kevin from possessing her), Proteus not only managed to escape the 616 reality but got chased through several different realities by the Exiles, killing 2 of them in the process. Currently, he's been brainwashed to think that he's Morph, the 2nd Exile he killed & inhabited.
Of course, you never know when he might get his memory back
.