Highest AC Monster?

Trying to decide on which hated enemy my ranger will choose. I'm thinking I'll just pick the monster with the highest AC (or one of the highest). I couldn't find a list anywhere.

Which monsters have the top 5 highest AC?

How about BG2? I'm planning to take this guy through both games, so I may yet pick dragons or something. Which monsters have the top 5 highest AC in BG2?

Bonus question: Does a ranger only ever get 1 hated enemy?

Thanks!