I see those two the way I see Kirk/Spock, Data/Geordi, and of course Bashir/O'Brien... a once in a lifetime friendship, but that's it. Tom was a womanizer who grew into a man who wanted something more real (and ultimately found it). Harry was a guy who was just unlucky in love. Of those assorted bromance members, the only one I think might have potentially swung both ways was Dr. Bashir, and his opposite number was determinedly straight and happily married.
So in short, I could see Tom with either Kes or B'Elanna. Or, if Voyager's writers had expanded the recurring cast, another crew member.