Improving technique through Bach, Mozart, Clementi and the like

[chopinlover01]

So, I attempt a lot of pieces that are much too hard for me. I have come to realize this for awhile now, and wish to remedy it with a healthy dose of Bach, Clementi, and the like.
(If you need any proof of my bad habits, I tried to take on Chopin's Op 10/1 while at a rough grade 4)
So, while I study my romantic pieces (which I will list below) what Bach, Mozart, Hadyn, Clementi, etc. should I be working on? I'm currently working on Bach's 13th invention in a minor, already did invention 8 in f major.
Here are the list of romantic pieces for me to work on:
Debussy: First Arabesque, Clair de Lune
Chopin: Etude 10/3, Etude 25/1, Finishing up 17/4, starting 55/1, soon to start Op 9/1 and Op 9/2
Rachmaninov: Prelude in C# minor, Op 3/2
Oh, and I've done Rondo Alla Turca but I don't think that really counts as proper technique building from what I've heard and seen...

[j_menz]

Bach - Two part inventions, little preludes and fugues.

Clementi - Sonatinas.

[hfmadopter]

We don't find a ton of Mozart fans in the forum but I think some of his works are worth doing and contrasting them against Clementi. Mozart in particular is worth working on for his phrasing, to learn it correctly you find yourself using that more and more in other works from various composers or even in your own if you get to that point. Or maybe it would be better to say that you notice it in other works. Find some level 5 and 6 pieces of his that you like and really learn to phrase them well. You don't need to do a ton of pieces from Mozart to get the picture. Maybe some minuets and K545 would get you started and later on Fantasia ( level 7ish ). I also think his concertos are great pieces to take on at some point.

Music is life long, so you don't have to knock this out and be on your way. I revisit Mozart periodically but many years ago when first learning piano my teacher handed me Mozart along with Clementi and Bach. Chopin came much later, though we worked on bits of the Chopin Etudes ( short sections from them) to learn something from them that could apply to any given piece I might have had from other composers. She used the Chopin etudes as a learning tool, My book of them is ticked in pencil with sections check marked off for me to study between lessons when I was working in say Schumann or someone !