"Best holster"? I can't tell you.
How and where on your waistline that you want to place your holster is an extremely personal thing. What works for me might be the most uncomfortable thing you've ever used. It's almost like choosing what style of underwear you like. Unfortunately, you're going to have to google "holsters" and look at a bunch of makers' products and try to find something that might work for you. There are literally hundreds out there. A better question might be to check here on the forum as to who's used a particular maker for info on their quality, etc.
I can say to look particularly at the belt loops, because those will be the part under your belt and pressed against your body. Look at how wide those sections are if they're on the back (as opposed to a pancake-style with the "wings" out to the sides), because wider usually means more stable. If it's something you want for concealment, you'll want to look at holsters that draw in snug, like a pancake or similar.
I strongly suggest sticking with leather. Kydex is pretty and usually less expensive, but it will never conform to your shape like a leather holster will over time.
Best of luck. Don't be discouraged if it takes more than one try at getting what's perfect for you. We've all been there... I have three(!) large plastic tubs of holsters I've collected over the years as I tried for "perfection." And I'm not the only one!