The correct answer probably isn't a single company, but a person: Fausto Vitello.
Whether it is High Speed Production, Ermico or Deluxe Distribution, brands under these have outlast any competition, have given opportunities to so many important people and are still relevant and shaping skateboarding in the '20's.
Others have been sold, revamped, quit, changed owners etc. but Faustos impact is still going strong years after his passing.