I would say easyJet is the best outfit right now on the A320. Good stable company, nice fixed roster (if you're lucky to have it) and you sleep at home most of the time.
Vueling is not bad provided you're a high seniority captain in your home base, specially if you're also LSC/TRE, at least money-wise.
I would also add Aer Lingus, they look nice.
Legacy carriers obviously are there... but let's not take them into account today...