I came into this thread to say Gellius and Bernice but I was beaten to the punch..

Bandits might be an option for you, Imelia boosts bandit's hp..

Or Alicia if you can buy her, she might have enough defense and hp to tank it. I haven't done the math. :P

Perhaps Lucille an Dragon Rider..

Or if your options is truly limited then next best thing is evasion tanking. lol For Evasion tanking, use rogues and ninjas.
Bring in an Colin and have her throw bombs at golems as your rogues attempt to assassinate with golem's defense cut in half. I do not know if Golems is immune to alchemist's defense debuff or not.