crippling self-doubt concerning my animator identification skills would be significantly assuaged if the explosion turned out to be Takahiro Komori

I believe this is Tadaaki Miyata alone since he is top credited next to Hiroshi Ousaka.
Edit:
Oguro: so for episode 20 “Pierre Le Fou” I thought you were behind the scene at the start where Spike and Pierre are fighting. Am I wrong?
Yutaka Nakamura: That is wrong. That part was handled by Miyata Tadaaki-san.

https://wavemotioncannon.com/2016/11/02/interview-yutaka-nakamura-web-anime-style-7192003-part-2/