This is a little weird, but bear with me. My Two Dads (my recent Awesome Old Song of the Week post prompted today's blog) aired on NBC from 1987-1990. Blossom was a hit for the network from 1990-1995. Friends debuted in 1994, and lasted until 2004.
So the answer to the question in the title is, Greg Evigan, Joey Lawrence and Matt LeBlanc (left to right) all played slightly-dim, comical pretty boys named Joey for 17 consecutive years on NBC (or 19 years if you throw in LeBlanc's spin-off show, Joey).
|Joey. Joey. Joey.|