I carry either a 1911 CCO or 1911 compact. Both conceal just fine.
If shirttail out, OWB. If tucked shirttail, shoulder rig.
Either my Guardian or my Kimber Stainless Compact II which I did a round butt mod to conceal easily. I can carry my Sig Nightmare Fastback in Sig 357 but it is a lot heavier than the other two.
However, all of them conceal easily.