GOP gains 3 seats.
Lean R - Sherrod Brown is defeated for re-election (assuming he runs)
Likely R - Jon Tester is defeated for re-election (assuming he runs)
Safe R - Joe Manchin is defeated for re-election handily (again, assuming he runs)
Out of all the above, I'd give Brown the highest chance at re-election, but if Biden loses Ohio again by ~8 points, it's hard to see Brown holding on.
For DEM leaning seats, I think Baldwin and Stabenow will be saved by Biden being at the top and winning re-election in WI and MI. I can see Baldwin winning 52-47 and Stabenow 53-46, vice-versa, or something similar. It's plausible both can lose, but only if Biden fails to win either state or keeps his victories very close.
Texas is a total tossup and depends on many factors. It's still a rosy red state, but one which is becoming more Dem-friendly by the minute. It depends on the candidates and demographic changes. Beto was almost able to take Cruz down in 2018, so we'll have to see what happens with Biden (or another Dem) and a Republican at the top of the ticket. My gut says the GOP candidate wins something like 50-48. Maybe the senate Dem candidate outperforms the presidential candidate by enough to narrowly carry the state against Cruz, something like 49.5-49.1.