This Show has Three Creidted Music Composers

Since you like collaboration: Yuki Hayashi has a collaboration album with Hiroyuki Sawano (Triangle). Speaking of giant robots, he also did the soundtrack for Gundam Build Fighters. Of course, he's best known for BnHA. If you want something from this season, he's doing Medalist (started yesterday; the manga is great, but I haven't watched yet) and Sakamoto Days (starts on Saturday).

I don't know about the other composers, the main theme was the only track that really stood out to me, and that was Hayashi.

Takeshi Abo is the real GOAT here. He is the composer of the Science Adventure series, the series in which Robotics;Notes belongs to. This series also includes Steins;Gate (which you may already heard of). Takeshi Abo to SciADV is like John Williams to Star Wars. If you want to check out his other works, I recommend you to watch Steins;Gate and Steins;Gate 0, or alternatively play all the visual novels in SciADV (sadly apart from S;G, they don't have good anime adaptations)