Ben Seaver outgrew Mike and Carol (Growing Pains)

Tina Yothers outgrew Michael J. Fox (Family Ties)

I think Jerry Mathers was taller than Tony Dow when they both did Still The Beaver

Mark outgrew JT on Step By Step

Screech outgrew Zack, Jessie, and Slater on Saved By The Bell

Zack outgrew Jessie and Slater on Saved By The Bell

Kevin Arnold outgrew Wayne and Winnie (The Wonder Years)

Urkel outgrew Laura and Carl on Family Matters

Mark outgrew Randy and Brad on Home Improvement

That's all I got

The actor who played Albert on Little House On The Prairie is taller than Melissa Gilbert who played Laura Ingalls.

Jim-Bob(David Harper) outgrew the entire cast on "The Waltons". Also Erin ( Mary Beth McDonough) outgrew older sister Mary-Ellen(Judy Norton-Taylor)