If you want driving, progressive fullbacks, we should have signed
RB Sergi Roberto or João Cancelo (deffo the most attacking of the 4) or Álvaro Odriozola or Sime Vrsaljko
and
LB Lucas Hernadez or Alex Sandro or Alex Telles or Jose Gaya
There are your 8 best options who are even remotely (and some will take insane money) available next year
Alaba and Kimmich would cost £90-100m or so each so I dont even bother to include them