Arthur “Fonzie” Fonzarelli - Happy Days
Fan of: The Lone Ranger
Fonzie occasionally references admiring the Lone Ranger growing up. Fonzie idolizes the Lone Ranger and eventually meets John Hart (in costume), creating a moment where the childhood hero becomes real in the show's world.

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSe9hQrrUDTLb8wYhSHhP-6W4XVh8KKTadXzA&s

Al Bundy - Married... with Children
Fan of: Hondo Lane
He repeatedly references watching westerns and admiring Hondo Lane (John Wayne).

https://www.sitcomsonline.com/photos/marriedwithhondo.png

What are some other examples?

Phoebe's obstetrician in Friends is obsessed with Fonzie:

https://youtu.be/iQ8iuZ2ulfk?si=uKTl6ExIA5GfjTxK

Phoebe's obstetrician in Friends is obsessed with Fonzie:

https://youtu.be/iQ8iuZ2ulfk?si=uKTl6ExIA5GfjTxK

“I don’t want someone down there telling me I’m diluted-amundo”

Chandler of Friends was a fan of Baywatch and specifically a fan of Yasmin Bleeth.