Spiderman from the Marvel vs Capcom 2 game converted into mugen engine. Character can be downloaded on the link here at the bottom of the page.
Marvel vs Capcom Archive
Rogue is a fictional superhero by Marvel Comics that appears in X-Men. She can steal moves from 100 different characters. Download link is here
Strider Hiryu is a Marvel vs Capcom character. Download Strider Hiryu by Infinite for free here
Gambit with Marvel vs Capcom gameplay and some cool original moves. You can download it here