Which modern HOF ( or currently playing future HOF) players signed the least during their career?

It seems like theres so many autos in different products now with all the parallels. So i started wondering who is the hardest autos of quality players to find? Verlander, Betts and Greinke come to mind. Verlander only signed 1st few years I believe. I know Betts started this year again and read Greinke signed very rarely( not sure on this one). Wondering what other guys are tough to find autos?