A_Veiled_Mask
Tantei_Saru3
I know I can probably think of someone else, but I'm sleepy, so I have to go with Gin, from Detective Conan. The man is freakin scary is what he is lol Totally badass. High-ranking member in a dark syndicate, expert sniper, quite the detective, and has a cold stare that'll make anyone flinch, and in a lot of cases, walk away, stand down, surrender, run like hell lol And I totally agree with you on the whole "real person" characters, humans in other words, it just puts you on the edge of your seat, man xD
Another good choice for an anime villian! Got to love those realistic ones! How ya been friendsy?
Pretty good actually Getting some projects done, well, 1 lol But it's a big one xD And I'd like to add Hizumi Mizushiro. I'm not entirely sure you can call him a villain.... and you most likely don't know him, but he's awesome. And his interaction with Ayumu, the main protagonist is freakin hilarious XP He's the jolly killer type ^_^ lol jolly in general, cold when killer. He's always smiling, looking on the bright side, and he's social. Wait, you said ANIME villain.... Hizumi's manga lol