It's pretty hard to find a sheltie who doesn't have Peter in their lines these days... a more recent dog I hear a lot about is Jade Mist Beyond Tradition (Dillon.) I don't think he's still living and he didn't produce anywhere NEAR as many champions as Peter, but he's certainly a popular face in several lines these days...
Sir Joshua of Winslow, funny enough... has Peter in his lines.
http://bowlingsite.mcf.com/rom/Josh.html
ETA: I was curious to see if I could find Peter in Auggie's pedigree. Joshua of Winslow is Auggie's great-grandmother's grandfather; Peter is Joshua's great-grandfather. So he's several generations back but, there you go - he's in Auggie's pedigree too.
Sir Joshua of Winslow, funny enough... has Peter in his lines.
http://bowlingsite.mcf.com/rom/Josh.html
ETA: I was curious to see if I could find Peter in Auggie's pedigree. Joshua of Winslow is Auggie's great-grandmother's grandfather; Peter is Joshua's great-grandfather. So he's several generations back but, there you go - he's in Auggie's pedigree too.
ETA 3: Here is Dillon- http://bowlingsite.mcf.com/ROM/Tradition.html
Who is Peter, I'm drawing a blank? I have an awesome old sheltie lineage book I found. It's not with me, but has a lot of the old time dogs. It came out before Dillon was showing (or maybe even born). It has his mom in there, though.
ETA: Just saw this name by Outline- Halstor's Peter Pumpkin. I guess it's safe to say there are a few very popular sires in the breed that have a lot of influence... I think they're all related too.