have 5 suitable operatic roles learnt from memory

I know the main arias for certain operatic roles, but I need to be in a position where if someone goes “hey, fleen, I need you to sing fiordiligi next week can we fly you over?” (reputation pending) I can go ‘sure no worries.’ 5 suitable roles I reckon would be the countess from figaro, fiordiligi and/or dorabella from cosi, pamina from die zauberflote, adriana from adriana lecouvreur and … um… micaela from carmen. (roles chosen at random)