What cable companies make the best cables and sell them directly?

I upgrade my speaker wires, power cords for both my ARCAM and my Bluesound and also upgraded my digital cables.  I was fortunate to use The Cable Company.  I worked with Jason Ressler and he is by far the most knowledge people I have worked for.  He understands everything involving audio.  He should be teaching.  He is also one of the nicest people I have every worked with.

https://triodewirelabs.com/

The best? Who knows as it’s very taste/system dependent, and then there’s budget that I don’t think you specified. Good news is pretty much all have generous trial periods, so read reviews and have at it! Cullen makes very good and reasonably-priced cables as does Audio Envy, Triode Wire Labs, Darwin, and Zavfino among others. One that flies under the radar and if you’re into silver cables is LavriCable — I’ve got a few of their cables and they’re great with both excellent transparency and musicality, which is a tough act to pull off. Best of luck.

Thank you to all who have responded.  I had no idea there were so many cable companies that could fulfill my needs.  I will follow up on every suggestion and make up my mind based on the information contained on the cable company's website and your suggestions and advice.

Again I truly appreciate all this wonderful and speedy help.

"I will follow up on every suggestion and make up my mind based on the information contained on the cable company's website and your suggestions and advice."

That should take you a couple of years...if you're retired that is.