Ah, in English what I wanted to say was something like

"No matter how capable he was, compared to the fashionable appearances of those around him, his run-down appearance stood out and contrasted with the lab's overall atmosphere.

I understand clearly and my original correction is ok, but I would say
"彼はどんなに有能であっても、汚くてみすぼらしい外見が周りのおしゃれな格好に比べると際立っていて、この研究所の雰囲気に全く合わない。"

ありがとうございます！