A bit out there, but if Poch is not coming back, I would go for a lesser known manager.
My option would be Cristian Titz (cue the puns)
On a serious note, I think he would be a good choice.
Yeah, he plays a 3-5-2 or 3-4-3 and some on here have complained that it don't work in the PL mostly based off the idiot Amorim.
Didn't Conte switch to 3 at the back with Chelsea when they were not doing well then went on a storming run and won the league ( needs clarifying )
Titz plays an aggressive, high-intensity style and focuses on quick, vertical attacks. While often defensively solid, his team can shift to a more aggressive, possession-based approach or a faster, counter-attacking style depending on the opponent.
Titz has published several specialised books on football training methods. ( Maybe someone should of told Ange and Frank about them)