See, I have a bit of a problem slashing Grant with Jack (or anybody, actually).
Grant from "Jack's times" is to me so vulnerable and inadequate, that I just can't imagine him with anyone. He's just like a little kid in a grown man's body.
He did change but it begun after Jack's death and it's clear (well, for me, of course) only since second half of season 4.
Now Grant / Lee - that would be cool.
I have to admit, that my wicked mind supplied also some Jack / Lee images... *g*