I don't remember seeing him talked about but I really like Raj's dad
I'm watching the episode where Raj is trying to win Any back after the camera incident. He is talking to his dad who tells him he is a good man.
It occured to me that he has always been tough on Raj but still supported him financially and was never really mean to him. He seems like a good guy.
So from now on my answer to the question, "Which non main character do you wish wasn't more episodes?" is going to be Raj's dad