There's a mudcrab down by Riverwood I have my eyes on. I swear it winks at me. So I wink back. Seriously though, probably Elisif the Fair, second would be Aela (in terms of looks). In terms of character, Paarthurnax.
Aela the Huntress, Aela the Huntress is like an Nord / Werewolf / Archer version of Red Sonja!
Never been that interested in Aela myself, but the common complaints about her "losing her personality" after marriage had me go and watch a couple of YouTube videos to see what she sounds like after you've married her. I have to say I'm seriously wondering what some people expect married life to be like. Constant trading of snarky one-liners punctuated by fistfights maybe?
Nocturnal, Ysolda, pretty much ANY girl in the game that isn't an old woman is hot one way or another. Also, Lydia. Yeah, I'm not annoyed by her. She's awesome.
Where do I find this lady? I remember seeing her once, was she perhaps a court mage?
She's a priestess in the Temple of Dibella in Markarth, so she's usually wearing a hooded robe and you only get to see her face. Here I just made her a follower and gave some other clothes after we got married.