Jedi, not Sith. I already said that if it's a dark side skill he won't do it. You've gone from "most powerful Jedi" to "stronger in the Force than anyone else". These are not necessarily the same thing. Supposedly it was said somewhere that Palpatine was the strongest Force-user in the saga. Also, you are defining "what is possible" by the limitations of a fixed group of characters at one point in time, but there is no guarantee that something is impossible just because the characters we know couldn't do it. Though the "most powerful Jedi" apparently can't do it with the light side, this does not necessarily mean that a sufficiently powerful Sith could not do it with the dark side, and recent EU seems to indicate that it is possible to increase one's own midichlorian count. You're assuming Palpatine knows that Qui-Gon did it. That is only speculation and certainly not a part of G-canon or T-canon.