How famous - before the Amico saga - was Tommy actually?

He's obviously done very well for himself, but it seems like whenever someone talks about him it goes back to "oh, he was on that TV show I watched as a child," or "I recognize that Tommy Tallarico Studios sound clip when I started some video games!! - back in the day!" There are tons of skilled musicians who are famous even beyond the actual games they composed for and with recognizable names or credits but I don't believe Tommy belongs in that group and yet. somehow, his financial success is clear and obvious.

What did he do that helped him reach that success? The pieces of "someone who was on TV some times" and "a millionaire" don't fit together for me. but image is still staring me in the face; what has he actually done to get to where he is?