Its pretty slim pickings.
The only other guy is Randy Daniels, and as much and he talks and sounds like a conservative, his background says he is far left (former Dinkins guy, worked for the media, engaged to the daughter of a dem party boss,etc).
Troublesome that sounds, but then again, maybe he "grew" in the right direction. At least Daniels has more government experience than Golisano (of course, that can cut both ways).