I appreciate the compliments, certainly. But I'd say the most important thing by far in accompanying is to listen first--to know exactly how the singer is going to do it.   Don't assume you know. And if you guess wrong on an accompaniment, be ready to move--immediately-- to something better. (You can always claim it was a leading tone--leading to your second, better idea.)

Most important thing in accompanying is to not trample either the melody or the words. I find often a low harmony works well--or a countermelody that weaves around the melody--not too loud--but helping the song at end of phrases, for instance.

A famous accompanist--pianist, I believe, (Gerald Moore?), titled his autobiography "Am I Too Loud?"