Energy has lots of team-shielders - Phalanx, Butter, Vanguard, even Castellan. Ronin and Halo have individual shields.
Mech has Caine who is awesome. Matador can shield himself and one other when the shield effect triggers (rarely though). Razor and Galante are self-shielding. Panzer has a shield technically but it has a very narrow timing window for it to work.