Who would people actually get rid of? Heres the list -
Kolasinac
Sokratis
Mustafi
Holding
Chambers
Özil
Elneny
Mavropanos
Guendouzi
Torreira
Laca
Realistically you can only get rid of 6 or 7 this summer
I'd rather look at who you'd build a new squad with or around. You take in individual quality, position, consistency, character on and off the pitch, importance for the team on and off the pitch (as far as you can tell from the outside), wages, contract length, potential, and maybe take into account who has been affected by the fallout in recent seasons too much.
Aim should be a multiple season overhaul and to change the face and demeanor of the team as quickly as possible by keeping those fulfilling certain requirements and injecting fresh blood - not necesarilly by trying to bring in a "star player" every year, but by first building a solid foundation that can compete and perform every matchday, then topping it off with higher profile signings on the back of consistency in the club.
Bare in mind you cannot change the whole squad in one or two windows and you gotta rely on longstanding players, even if just for off the pitch team chemistry.
My core would probably be (+/- 1 or 2 players):
Leno
Martinez
Saliba
Holding
David Luiz
Mari
Tierney
Soares
Xhaka
Maitland-Niles
Willock
Smith-Rowe
Martinelli
Saka
Aubameyang
Pepe
Nketiah
Nelson
There's a good core age- and experience wise. A good chunk of youngsters. And two "oldies". What that core lacks imo is of course more quality and instant consistency.