Alisson, TAA, Van Dijk, Robertson, Mac Allister. Although with TAA I'd say the jury is still out how he'd perform outside Klopp's system as a true RB, if he doesn't go into midfield soon.
But I think a clean slate and selling the likes of Van Dijk and Salah might be best for all, we get some funds in and the new manager gets to build his own team rather than inherit a Klopp team around which will hang unrealistic expectations because of past performances.
Alisson
TAA Konate X Robertson
X
Szoboszlai Mac Allister
X Nunez Diaz
We need three starting material players imo, and we can fill up the squad with players like Jota, Elliott, Jones, Endo, Matip, ... If we get a quality young RW then our front six bar Diaz will be 25 or younger for our new manager to build a true unit with.