Thinking short-term – offer Tuchel or Pochettino £5m for 4 months work to the end of the season plus a £5 million bonus if we stay up. It will enhance their reputation (and bank balance) if we stay up. If we go down then no one will blame them.
If we stay up then at the end of the season, and they like what they see, then try to negotiate contract to keep them. But if another big club is interested in them then no commitments on their part which would prevent them taking another job.
If we go down we have no commitments and we can appoint best person to get us back up.
Either of them would inspire the players - worst thing we can do Is appoint a manager who the players do not buy into.