I can only think of three that I would definitely want to see back.
Chuck Grassley
Jim Jordan
Ron Johnson
I know there are more good ones than these three, but off the top of my head these are the best.
None of the congresscritters from my state, Texas, should be allowed to return.
Oh I know there are a whole lot of good ones. That is why I wanted people to put some names to a list. As for those that are sleepers, I am more inclined to believe the sleepers are in some way compromised or they would have already stepped up to the plate.
There are whole contingents like those from Texas that need to be replaced. Our two Senators have both been lacking. Cornhole because he is against Trump and a RINO, and Cruz because he is a sneaky backstabbing posturing rat.