First of all, I agree with
@Himannv that Pele could surely play around a #10. He was so complete I think he'd work in almost any constellation.
But if you want to build around him and maximise his presence, I pretty much agree with this:
I actually think a 10 would be bad for Pele as he really liked to drop deep to playmaker even in '66 although you could argue that was because of the lack decent midfielders in the '66 squad.
In most instances when I watch him, I get the impression that he likes to drop deeper, see the game in front of him, and work his way in with a combination of interplay and his own skill. He could play up front as well like R9 if needed I reckon, but his natural game seems to be as a 10 himself with a free license to sometimes be a 9. Or in other words, a free role behind a more dedicated striker.
So for me it's either him being the offensive hub of the team (like in 60s Santos), or first among equals in a total free-flowing attacking side, where he could play several positions.
Btw, does anyone know if Pele ever played with a dominant attacking #10 à la Maradona/Laudrup? I perceived Didi as more of a creative midfield playmaker in those Brazil teams than a true attacking one. Rivelino was mainly put on the wings (although he roamed), etc.