Apparently he had a substantial career writing many other songs I've never heard of, with four Grammy nominations for it.
Dave Frishberg, Writer of Songs Sardonic and Nostalgic, Dies at 88
A gifted jazz pianist and a singer with a limited range but a distinctive voice, he wrote mostly for grown-ups but reached his largest audience on “Schoolhouse Rock!”
On an another note... that has to be the slightest comb-over I have ever seen. I don't think you could have less hair and still have anything to comb over. And yet, somehow, if you squint a little... it kinda works.