Luis Enrique. If we can lure him away from Spain he'd be a great option. Great results, fun to watch football and when packed with enough quality looks grear in posession. We'd need a great DM who is good at passing though, so that would have to be the first transfer in the door.
At this point it should be between those three Pochettino, Ten Hag or Enrique. Ralf has been a good interim, but I really want to see one of those three at the helm come next season. We can't be seriously considering appointing a man who has been working as a DOF for the past decade as permanent manager...