Earl Thomson won an Oly gold for Canada. May have become a U.S. citizen when he coached at Navy, but his coaching credentials pale compared to his athletic credentials. Of course, this just may be another example of the old boy network putting in one of their buddies.
The ultimate exception to a US only rule for someone who wasn't a noted coach was Stella Walsh. She competed internationally for Poland.
So, yeah, where are the other longtime residents, not just the guys who were here only for college. People who won several AAU outdoor titles like McKenley (3) or Ritola (4) or Orton (13)??