Some of those are before my time, but growing up in the Chicago area of course I know Bozo! It was a major deal if you were lucky enough to get tickets to a taping.
Some of those shows I think were filmed locally in L.A
My mom took me when I was 5 to Sheriff John Show and my brother was on Winchell Mahoney Show and Billy Barty!
Yes Bozo was great! lots of kids wanted to be on his show!
My best cartoon was the Jetsons!