yosuke, chie and yukiko, bro.
Yosuke's late game wind attacks are consistently the most powerful thing that gets thrown out there
Chie is a physical monster in the late game. Tarukaja + Power Charge + God Hand = Totes OP and has the ice damage under control.
Yukiko is the main healer and has strong fire.
This allows you to have Electricity as your main and can dabble in light/dark and buffs, debuffs.