I'll do 20.
The Beatles
ELO
Earth Wind and Fire
Average White Band
James Brown
The Temptations
The Supreme
Todd Rundgren/Utopia
The Tubes
The Who
The Rolling Stones
Genesis
Alice Cooper
Linda Ronstadt
Dixie Chicks
Chicago
Bruce Springsteen
Boston
Yes
Emerson Lake & Palmer
Stevie Wonder
Tower of Power
That's 22. The list is much, much longer, and many of those listed I have seen more than once. I have seen Todd at least 40 times over decades. I was at the shows that were used on Back To The Bars.
Some of them go back to a time when a concert was $5. When I was in the Army in Oklahoma, which makes it 1973, there was a show in OKC that was The Band, Buddy Miles, Deep Purple and Santana. The tickets were
EIGHT DOLLARS!