Ratchet and Clank, Uncharted, Killzone, Sackboy, inFamous, God of War, The Last of Us, and if you want to go older, SOCOM, Syphon Filter, Spyro, Sly Cooper, I could go on.

They've all got their own boutique developers and were simply published by Sony at one point or another (not even exclusively). Insomniac Games seems to be the real owner of the IP for a bunch of them. Hell, most of these are just knock offs of other franchises. Sackboy is a very obvious Mario/Sonic analog that simply never got popular in the same way.

If every consumer went along with that set of ideals, every studio, firm and corporation would be free to jerk us around willy nilly

There are definitely some publishers more open to modding than others. Early on, you could accuse Nintendo of being a sleeping giant who failed to give modders warning or opportunity to compromise. But now modders are just trying to hug a very large hedgehog with it's spikes out.