Boufal is probably the only one I would agree it's worth keeping to let him go for free. We aren't going to get better than him for what someone would pay, and as we won't be replacing him as we can't afford it we don't need to worry about getting his wages off the bill until next summer, so keep him as backup and let him leave next summer.
Carrillo, Hoedt, Lemina I would let go for a couple million each.