Who to look for?

[HasselhoffsCheeseburger]

I'm not an active futbol card collector but I've picked up some rare Pele cards just because I was in a position to find them before anyone else. That happens a lot in my internet travels and I was wondering if there were other futbol players from older eras that I should be scooping up if I come across.

Anyone pre-1920?

1920-1940?

1940-Pele?

Pele's playing days?

After Pele, I know of Maradona and then that's it until you get to players that are still active like Ronaldo. My searches don't really go more recent than 1980 so I'm not interested in any modern players.

Any input would be greatly appreciated.

Arthur