I don't know why you aren't counting the kickers. Borregales was at least average as a rookie, not sure how he "wasn't even good". And Baringer just doesn't count because... reasons?
I'm also not sure why you aren't counting Ashby. He's a good long snapper. Everyone needs a long snapper. So he doesn't count because... reasons?
Pop Douglas doesn't count because... reasons? Here's their career stats:
Douglas - 146 receptions, 1629 yards, 11.2 YPR, 6 TDs
Boutte - 78 receptions, 1159 yards, 14.9 YPR, 9 TDs
Boutte has a higher yards per reception and more TDs but Douglas has significantly more yards and receptions, so when you said "starters or contributors" and counted Boutte, I don't see how you couldn't count Douglas, considering he's output 50% more yards and almost 100% more receptions than Boutte over 3 years.