Samples:
All-American, Angel, Ant-Man O'Grady, Ant-Man Lang, Mrs. Arbogast, Antonio Argent, Attuma, Aunt May, Avalance, Beast, Big Zero, Blizzard, Blob, Blueshield, Brother Voodoo, Black Widow, Bethany Cabe, Cannonball, Corsair, Cyclops, Daredevil, Kathy Dare, Darkstar, Dazzler, Deadpool, Deathbird, Diamondback, D'Ken, Doc Ock, Domino, Doom, Dr Manhattan, Dr Spectrum, Egghead, Ereshkigal, Eternity, Executioner, Exodus, Fastforward, Fooferah, Forge, Frenzy, Galactus, Gateway, Gladiator, Jean Grey, Rachel Grey, Lucinda Guthrie, Gzoom, Gabrielle Haller, Hammerhead, Havok, Hawkeye (Bishop), Hawywire, Hellcat, Hera, Her, Hercules, High Evolutionary, Hrimhari, Hulk, Hulkling, Huntara, Husk, Iceman, Iron Man, Jarvis, Madison Jefferies, Jocasta, Juggernaut, Justice, Jennifer Kale, Robert Kelly, Kraven, Living Tribunal, Lizard, Lockjaw, Machine Man, Moira MacTaggart, Magma, Magneto, Makkari, Marrow, Melter, Mercury, Moonglow, Dani Moonstar, Moonstone, Ms. Marvel, Namor, Namora, Nightcrawler, Nightmask, Northstar, Nygorn, Overshadow, Patriot, Marcy Pearson, Perun, Photom Pitbull, Pixie, Power Princess, Presence, Psi-Hawk, Psylocke, Hank Pym, Quasar, Quicksand, Radioactive Man, Cecilia Reyes, Franklin Richards, Reed Richards, Sue Storm Richards, Valeria Richards, Rictor, Rogue, Sabra, Sabretooth, Scalphunter, Screwball, Shaman, Shape, Sebastian Shaw, Sinister, Skeletron, Skylark, Smasher, Speed, Spider-Man, Gwen Stacy, Obidiah Stane, Starfox, Stature, Stiltman, Storm, Stranger, Stryfe, Sunfire, Sunspot, Thanos, Thing, Thunderbird (Sharra), Tower, Vanguard, Vostok, Vulcan, Adam Warlock, War Machine, Warpath, Kate Waynesboro, Whiplash, Whizzer, Wiccan, Winter Soldier, Wolfsbane, Wolverine, X-23, Charles Xavier
Ultimate: Cyclops, Angel, Nightcrawler
http://www.zereldax.com/marvelicons.html