So who is this person?

To me is Bob Ross the 1980-1990 artist that had his dedicated painting show on American TV (I discovered him late in my life as I am from woplandia, Italy) because of this very sentence (paragraphed):

"I dediced to learn painting because I promised myself to not yell at anyone anymore"

He was an Army Drill Instructor before painting.

I relate to him because since I started painting, I became even more chill than I was already before.