Ruud Gullit could do pretty much everything.
Great in the air, great with his feet. Fast, strong, creative and brave.
I can't think of many flaws in his game.
Surely R9 embodies these traits and I would have him a level above all those mentioned.The obvious and, really, the only choice for the top spot.
Beckenbauer, Matthäus, Di Stéfano, Cruyff, Rijkaard all would be in the tier just below.
I mean he might be a tad below on creativity and in the air but peak Ronaldo is levels above these for pace, strength, ability, finishing, dribbling (and dribbling at insane speed.)