I am left Handed as well.. I am not sure if you tried it yet, but I find the best concealed/most comfortable option to be a JM IWB3 with snap loops straddling my 8:30-9 o' clock belt loop. I've tried various cants, and more cant = more comfort for me because it takes the holster off of my hip bone. I settled on 15 degrees because it provides comfort and isn't too canted to where I can't establish a good initial firing grip.
To add to the AIWB part of the thread.. I may be weird, but I find appendix much more comfortable without the bulk of a foam wedge, just not as "comforting." The JM Wing-Claw is excellent, I just prefer a Glock on my strong side.