1a. Webern, "Five movements for string quartet, op. 5, no. 4": https://youtu.be/ELAKF8ZxDmg?t=378
I really like his ability to be super sparse, only using what he needs to get the job done. It's a quality that I think is super important. Sometimes it comes off as sparse or dead-sounding, but I'd argue his use of processes is the meaning in and of itself, even if it's not an affective one.
1b. Kapustin, "Fugue in A minor, from Op. 82": https://www.youtube.com/watch?v=LaNT6P5x-tI
I still love Gershwin, but the level of control between classical and jazz Kapustin has is wonderful to me, and I think this is one of the fugues that really demonstrates that. He's capable of straddling the line between the two or going in either direction — it's wonderful.
1c. Schnittke, "Requiem, Agnus Dei": https://www.youtube.com/watch?v=_-ybWVagNm4
Although this piece doesn't show it necessarily, Schnittke is probably one of the most viscerally poignant composers I know of and knows how to control timbre to the maximum to achieve this. His famous Concerto Grosso is a fantastic mix of all of those elements as well.
2. Revueltas, "La noche de los mayas: IV": https://www.youtube.com/watch?v=AtCVqO4WlsM
Seems to take a lot of disparate processes and find a way to blend them without too much trouble. A lot of his other pieces are often about creating cohesion from very separate ideas and I think it's incredibly admirable.
3. Brahms, "Symphony No. 4: I. Allegro non troppo": https://www.youtube.com/watch?v=_P2AzhECVJ8
I've always felt his MO was a little bit too... arbitrary? It's fine music, there's just a feeling like it's trying to put too much new stuff into a formula that doesn't need it. I particularly don't like this movement.
4. I'm not doing much writing anymore, but I'll throw this here as something I've written recently... just an exercise in melodic transformation and counterpoint, but I think it's nice despite how easy of a piece it is.
Thanks for this!