Sarah Champion won't even be considered.

If it's a male leader then .....Keir Starmer. ( he's not a Corbynite, he voted for Andy Burnham as leader )

Female leader .....Jess Phillips or Angela Rayner anyone except Long - Bailey or Emily Thornberry.

Ironic that less than 50% of Labour MP's didn't vote for Corbyn.
Even John Healey didn't vote for him.