I got Galco Sto-N-Go
AIWB holsters. I use one for my G26 and 19 and got another for a Taurus 5-shot 357 revolver. I, too, am 6'3" and not overweight (no "washboard abs" but still...).
The holsters have one clip centered and a re-inforced mouth. I find AIWB extremely comfortable especially
when sitting. I took a little mental getting used to having the Glocks pointed at my business but after reading and thinking and making sure I concentrate on what I am doing I am comfortable. The revolver is a piece of cake.
I like those Galco holsters and they were inexpensive (I think around $26 IIRC) but quite good quality.