Take Clemson, Florida State, Miami, North Carolina, North Carolina State, Virginia and Virginia Tech out of the ACC.
So we can imagine a small but mighty basketball/football conference of
UConn,
West Virginia ( after the B12 break up)
BC,
Syracuse,
Pittsburg,
L'ville,
You need two more, (at least) the candidates would be from among...
Georgia Tech,
Duke,
Temple,
Nova (if they add football which they have tinkered with for a long time),
Notre Dame (maybe as a non-football member only. And if they guarantee to schedule a few football games each year.
This covers most of the large cities on the East Coast. That gives it a little negotiating leverage.