sakuga@wiki credits Hollands charge at Charles to Tatsuzou Nishita:

■交響詩篇エウレカセブン　原画　２７話
チャールズに向かって突っ込み、至近距離から射撃するホランド

Much like the rest of the notes on his page, this is a guess that was made 10+ years ago, since it was also tagged on Liborek's original upload here

I decided to remove the tag because it's too uncertain. Mainly because he has another completely unrelated scene that looks way more like his style (post #239251) than this one, and it would be odd for a outsider to the production to take two scenes when the episode is stacked to the brim with strong animators. It's entirely possible this is still his work but its better safe than sorry in this case.

Also worth mentioning the Nirvash in the background @ 0:32 has Nekomataya's air brush/gradient finishing so I wouldnt be surprised if he drew that. Not many mecha animators credited on this one