One of the longstanding examples of this that immediately sprung to mind is Dale Chihuly ( https://en.wikipedia.org/wiki/Dale_Chihuly ), the renown glass sculptor. Except Chihuly has not physically produced ANY of the glass sculptures attributed to him since 1979: "...he continued to blow glass until he dislocated his right shoulder in a 1979 bodysurfing accident. No longer able to hold the glass blowing pipe, he hir…
It is important to point out that glassblowing is a team-focused effort from the very beginning. Although it is possible to work solo, it makes everything many times harder, and on top of that, makes many standard moves impossible to perform. Even the simplest transfer of a cup form to a punty is best done with at least one assistant, and for wraps and handles, having someone able to take a dip and prep the pull while you work on the main piece is a practical necessity. The Corning Museum of Glass has excellent videos of master gaffers at work that show just what a team effort any form is.
https://www.youtube.com/watch?v=oahrrN8ZHwE
Great fun to watch if you're even slightly interested in glassblowing.