Then there's Smithers and his obsession with Mr. Burns and of course Rod and Tod are clearly on the same path... not to mention Marge's sisters....
Rod and Tod! That'd be a classic choice, as I remember that episode where they show R&T in the future, and they're both on the front lawn, either washing a car or painting some furniture, and they're both dressed in Freddy Mercury shorty-shorts with obvious insinuation!