Ahhhhhh...Miloslav Mecir...the big cat, one of the smoothest players EVER!
Guys and Gals, I've seen a video of a French Open match between Mecir and Lendl and you wouldn't believe how slow they're hitting. I know that was Mecir's game plan (to bore Ivan to death), but holy sheep they're seriously hitting softer than Henin versus Serena. At one point I think I remember the crowd booing.
Mecir was just massaging these moonballs to Lendl's backhand, and Lendl was looping them back. Repeat. Repeat.
As for the poll question, here's a few one-handers who I think have/had prettier backhands than Lendl: Guga... Pioline... Gaudio... Federer... Edberg... Rochus... Corretja... Mantilla... maybe Haas and Arazi... Stich... Pavel... Henmans's slice... Sampras' slice...
I was never a big fan of Becker's hammer gripped muscle-bound backhand.
One handers are just inherently, IMO, more beautiful than two handers, so really there is no two handed backhands that I think are as pretty let alone prettier than a good one hander, but Safin, Kafelnikov, Mardy Fish, and Agassi all have lovely two-handers.