Neither Bentancur nor Hojbjerg are 'sitters, though. This is the mistake that people make with the pair of them - their entire career, people have assumed they screen the defence, which isn't true.
Ruben Neves is a 'sitter'. Matic is a 'sitter'. Players that sit deep, fill gaps, cover shots, get out to their men.
Bentancur and Hojbjerg are both Khedira-esque ball winners, best closing high and winning balls all over the field. They are good tacklers - they are not good positionally, because their best role involves a free roaming assignment to close down and tackle.
In the peak Madrid team under Mourinho, in a midfield duo of Alonso and Khedira, Alonso was the screen, not Khedira. Khedira rampaged up field winning it high and laying it off to Ozil/Ronaldo/Benzema et al. Alonso sat deep and screened the backline + played it forward from deep.
We lack that player. Winks is useless. Skipp, Bentancur and Hojbjerg are all functionally identical. A positionally disciplined 'sitting' midfielder? We've lacked one since..well, actually, probably since Huddlestone.
Parker, Sandro, Palacios, Wanyama, Dembele, Sissoko, Hojbjerg, Skipp, Bentancur...all best as free-roaming destroyers. Not sitters.
And every top team has a sitter. Rodri, Matic, Xhaka + Partey, Jorginho, Fabinho et al. Even Spam have Rice who can even drop in as CB when needed.