Look at Wind Man's turbines!
After working on the project for a number of years, Rockman Corner reader "Ricardo" has finally finished working on his clay miniature figure line, featuring every single Robot Master ever from Mega Man 1-10.
I'm currently replaying every Mega Man game ever made now, and as hard I as tried, I couldn't find anyone missing (if you don't count Rockman and Forte, the Game Boy's Mega Man Killers, or Mega Man V's Stardroids, and just go on the proper numbered games).
If you're asking, "where's the X series?" Those aren't Robot Masters -- they're Mavericks.