Being a larger gentleman(pronounced FAT GUY), I usually carry a full size 1911 IWB. I haven't tried a lot of compacts, but Para's WartHog was my favorite of the ones I tried. Generally, when I need UDC and reach for something small to carry, it's a DAO hammerless J-frame in a Galco tuckable.
'07 Single Ring Old Type, '21-'29 Gold Old Type Ball End Handle, '28 New Standard Gold, Gold NEW Ball End Handle(long teeth), Gold NEW Common Bar Handle(short teeth), NDC Gold Tech(3), '59(E2) Red Tip
GEM Micromatic Open Comb Antenna Handle, Schick G1(2), Schick G8, Rolls Razor Imperial No.2(5), Rolls Razor Viscount(3)
A. White CopperHead 6/8, D. Peres 5/8, Hamburg No. 49 6/8, Wade & Butcher 6/8, German Cutlery Co. 5/8, Wosty Pipe 5/8 wedge