Firms with Cultural or Substantive PI Alignment?

Title - looking to get a sense of which firms are more aligned with public interest work or plaintiff-side work either culturally or in their work. I have firms like Perkins, Covington, etc., but wanted to see if there are any others. After working at the firm I'd like to try for unicorn PI or something similar, and want to be able to work at firms that seem like reasonable jumping points. Apologies if this is an inappropriate forum. TIA!