Source: i-mockery.com

3. Baron Blood

MY FAVORITE CAPTAIN AMERICA VILLAIN OF ALL TIME. He isn't number one because"¦y'know what, I'm not sure why.

Baron Blood is Captain Rad of the USS Badass. He's a vampire who regularly fights Captain America.

John Falsworth was an English aristocrat who ran afoul of Dracula and got turned into a vampire himself. He tooled around for awhile before teaming up with the Nazis. Nazi vampire, you guys. He got his butt kicked by the Invaders, and wound up staked by a silver stalagmite. Then later he got staked again by Namor the Sub-Mariner. Then he finally fought Captain America, who dealt with him by"¦cutting his head off with his shield. Damn. Hardcore way to deal with a problem, bro.

Baron Blood also popped up in the Marvel Apes miniseries, albeit another universe's version of the character. Long story told shorter, Baron Blood is a vampire who fights Captain America, and that's friggin' awesome.