Laid Back Culture Firms

Hello everyone. So this summer, I interned in a research function at a department in a bank known for having a robotic and cutthroat culture. Some of the seniors inherited not the most valuable traits from the seniors they worked for in the old Wall Street days.

I was wondering if anyone could provide light on some firms that have more laid-back culture, which I think would fit me better personally. Obviously, when I mean laid-back I mean firms that still perform well but are known for having great culture.