My first recommendation would be to get a good gun belt if you don't have one already. It'll provide extra support for the gun, which will make it more comfortable.
There are lots of makers of different types of belts. I prefer the double-layer leather belts by The Beltman. Another option would be the holster maker you decide on. I believe the holster makers you mentioned also make gun belts, and they would be made to fit the holster's belt loops. Some of these belts are available with an internal stiffener between the layers for additional support.
There are also nylon belts, like the Wilderness Tactical Instructor belt, that can be had with internal reinforcement. They're made by other makers, too.
As for holsters, my general suggestion for an OWB would be a pancake-style holster. The Simply Rugged is a good example of a pancake holster. With the right holster, belt, and clothing, your 686 can be carried concealed in one. In this style, there are belt slots fore and aft of the gun. This helps spread out the weight of the gun, as well as pull the butt of the gun into the body for better concealment.
There's also the Avenger-style holsters, which typically feature a tunnel loop on the body-side of the holster body and a trailing belt slot to the rear. Not quite as concealable, but still a good option. Off the top of my head, the Milt Sparks PMK comes to mind.
One general recommendation I usually give is to look for holsters that carry the cylinder even with the belt. I've found this gives the most stable, and thus comfortable, position when carrying.
Most of my experience with holsters is for concealment, so there may be other holster options that may suit your needs that I'm not familiar with.
The holster makers you mentioned have a good reputation and would be a good place to start. In addition to them, from personal experience I can recommend holsters by Side Guard Holsters, Milt Sparks, Kramer Handgun Leather, and TT Gunleather. They're all custom makers, so turnaround times will vary. TT Gunleather usually has the fastest turnaround time, typically 3-4 weeks.
There are also plenty of production holsters by companies like DeSantis, Bianchi, Galco, Don Hume, etc., that may work for you. The advantage with them is that they may be more readily available at a lower price than the custom holster makers.
I would also suggest a search of the forum, if you haven't already, as holster recommendations are commonly discussed.
Finally, apologies if I've covered topics you're already familiar with. I'd rather err on the side of providing too much info than not enough (which any member here who has read my posts can attest to...
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Hope that helps.
