Namor the Sub-Mariner

I needed a new superhero. I've kinda grown tired of the bat and Tony Stark, so I bought Marvel Essential: The Sub-Mariner. Years ago, I had The Invaders #1 featuring Namor and that was the only acquaintance I had with the undersea dweller. His mythology is all new to me, and so far I'm enjoying this character and his rebel attitude. From Wikipedia:

Never fundamentally either a hero or a villain, Namor has protected his kingdom and sought vengeance on the surface world only when he feels his realm is threatened. Although he has served alongside, or even as a member of, superhero teams — most notably the Defenders, a "non-team" in which through mystical means he was forced to ally with Doctor Strange, the Hulk, and the Silver Surfer, the Avengers, and both the World War II and modern-day versions of the Invaders — Namor remains an outsider.

Who is your favorite lesser-known superhero?

No Moral Center: When Comic Books Ruled | My Year In Crime: Goodbye Comics Code.