A tie for me. Traditional the Grace and Tuxedo Mission. (I know, you listed Tuxedo Versus, but I don't think that song carries the same punch. Even if Kenji does sing it well.)
My favorite is Zigzag Slash but it seems like Jupiter got shafted. So my second favorite is the world died out. Just so people know I didn't pick "to a brand-new world'. bleh.
For me, it's a tie between Prince of the Earth and Forbidden Hades. But being that Prince of the Earth isn't listed, I'll be the solitary Setsuna supporter. I love "To a Brand New World," too.
I personally like Tuxedo Mission from the second musical...where there were about 4 Tuxedo Kamens singing it at once. Poor Usagi looked so confused! But I like Harsh Saint Cry as well...one of the few new 'Myu songs I like (having only seen up to the Death Vulcan musical...ugh...need more)
If you had listed any of Hikari Ono's songs, I would have voted for those, too.