You're breaking my heart here, and although I'm sure you mean well and it's nice that you are a fan of music from earlier periods, you're way off-base.
I've performed many of the works of Bach, Mozart, and their contemporaries and successors and hardly anything tops Bach in any of those categories. High harmonic tempo, rhythmic complexity in and between parts (Classical-era music is largely homophonic), extended chords via appoggiatura and other passing tones, four, five, and eight-part fugues with multiple subjects and counter-subjects.
Off the top of my head, here are a few Bach works that I think best exemplify his genius:
Passacaglia and Fugue in C Minor (BWV 582)
Singet dem Herrn ein neues Lied (BWV 225)
Chromatic Fantasia and Fugue (BWV 903)
Mozart, however, is elegant but very straightforward, even simple. Perhaps it's a personal experience bias as I've mostly only performed his liturgical works (Masses etc.) and arias from his operas, but there is hardly a comparison to be made between the two.