Realistically,
GK:
+ new GK (if Onana doesn't suit the new style of play & the budget allows)
Onana
Bayindir
Heaton
RB:
Dalot
AWB
CB:
Martinez
Varane
+New CB
Maguire
Evans (Only because the others are too injury prone)
Lindelof
LB:
Shaw
+New LB
Malacia (Not that good and less available than...