I would hold out for compass. That airline is going to move pilots and fast. You are looking at a pretty long upgrade at Expressjet, eagle and Skywest.
A lot depends on where you want to live also. Commuting is not fun, especially on reserve.

If it were me picking, I would take compass, Skywest, Expressjet, then eagle. Possibly eagle, then Expressjet as eagle has at least the potential to see some new airframes and a flow through which means more movement.