Clueless and running out of time!!

Why are boy names so hard?? I don't like anything and feel like I'm running out of time! I need name suggestions for a BOY that goes with Alexander and Joshua, his brothers. We usually call them Alex and Josh for short. So Alex, Josh, and ______. My husband likes Mason, which I think is ok but we have some reservations. We need he perfect boy name! Something strong that means "leader" like both his brothers. Help!