Right away I notice that this top 10 lacks any female characters (though they make my honorable mentions). I’ll chalk this up to being less familiar with the Marvel universe than DC. The female Marvel characters I’m most familiar with (i.e. Jean Grey, Black Cat, etc.), I just don’t care for.
My Top 10 Marvel heroes
5. Captain America
3. The Hulk
2. Black Panther
Honorable Mentions: Gambit, Rogue, Emma Frost, Luke Cage, Ms. Marvel, and She-Hulk