There is a HHr fic where Harry and Hermione are teachers, Harry wanting to stop all the fan girls decides to pursue McGonagall. Cue jokes pranked/shaved kittens, and a final showdown between Dumbledore and Harry.
I just forgot the link...
EDIT: Found it.
Never Say Never
COMPLETE: After finding himself pursued by every eligible witch on the planet, The Boy Who Won decides to marry for peace of mind. So he turns to Hermione for help pursuing...Minerva McGonagall? Comedy, I swear. HP&HG.