Cole Matthews doesn't look like that big of a 141 pounder compared to someone like Echemendia or Tagen Jamison.
First people that come to mind as looking big for their weight class are Levi Haines and Isaiah Salazar. Others that come to mind this year as looking big are: Stanich at 125, Crookham at 133, O'Toole, Carr and Hamiti at 165, Brayden Thomposn, Mekhi & Starrocci at 174, Will Feldkamp & TJ Stewart at 184 & Michael Beard at 197
For guys on the smaller side Shawver is a good example. A few more examples would be Teske at 133, Henson at 141, Gomez at 149, Antrell Taylor at 165 & Kennedy at 174