I gotta say, if I weren't such a Giles fanatic, I'd give Wes some votes. I always thought he was the hottest one on Angel. Hands down. There's just something about Watchers, man. lol.
But yeah, Wes is one of the most overlooked Buffyverse characters in terms of hotness, I think, because his character is never really pushed as hot. Angel, for example, is the romantic male lead. You're supposed to swoon. Spike is the leather-clad bad boy. Swoonage is required. Buffy and Faith? Ditto. Wes tends to be played for comic relief, intellect (read: "exposition"), and intense character growth. You're so busy paying attention to his character that you hardly even notice what he looks like. But in terms of looks? Wow, does Alexis Denisof have it going on. It's sort of a credit to his acting ability, I think, that people always focus more on his character's growth than on his hotness.