Favorite literary couple/pair?

[sgwordy.livejournal.com]

This morning I was asked about my favorite literary couple. Immediately after asking the questioner added, "Oh, Gen and the Queen?" So now I've been thinking about it all day. I'm having a hard time picking just one so I thought I'd pass the question along to everyone here. And if you're like me and can't think of just one, how about a top 3?

(as always, if you think there are relevant links in the archives please post them if you get the chance, I skimmed the archives but didn't see anything specific - thanks!)