Probably Romney, maybe Sasse and Alexander on principle. Also probably everybody who's in a close race for re-election -- like S. Collins. It wouldn't surprise me if they went to McConnell quietly and said "Don't do this to us."
What "hard work" by Moscow Mitch? All he had to do with previous candidates was not let Garland's vote to go forward, and to not probe into Drunky McRapeface's background. Sounds pretty lazy to me.
who will push this through in record time.
That Moscow Mitch will push a Trump nominee through is a given.
The question is, will he push it through before the election or after the election, in the "Lame duck" session after the election but before the inauguration. I think its possible that some senators will want to wait until after the election, since doing so before the election would risk giving those senators at risk of losing (such as Collins or Gardner) a bigger headache. And remember, the majority of voters opposed the nomination of Drunk McRapeface....
I can't think of much benefit to pushing the nomination through pre-election... they already have the bigoted evangelicals solidly behind Trump (and they know he'll nominate another wing-nut).