Aric @ Aric Audio - A real gentleman who is always eager to help. I’ve owned two of his amps and bought both on the used market. He was responsive to my queries even though I didn’t spend my $$ with him.
Arek @ Hattor Audio - I bought one of his preamps from Poland. Very responsive and quick to respond to questions. Made the long distance deal very smooth and easy. Great products at great prices.
Kevin Carter @ K&K Audio. Met him in person 20 years ago after he built me a phono preamp. Awesome dude who loves what he does. Foolishly sold the pre, but will own one again someday.