Ryanair.
I thought at first that O'Leary would be rubbing his hands with glee at the thought of all those Monarch pilots looking for a job. Unfortunately for him ( and them ) Monarch's fleet seems to be all Airbus, although some of the crews will be ex Boeing.
I don't know how easy or difficult it is for someone who has only flown Airbus to convert onto a more 'conventional' aircraft ?