Leftist/Socialist Mass Effect Playthrough

I was wondering if anyone has a tried a "leftist" playthrough? Certain things like curing the genophage or making peace between the quarian and geth would easily fit into that, of course. But what about renegade choices? Just punch Udina?

I'm genuinely curious. I know that as a representative of the Systems Alliance, one isn't in a great place to be a space socialist. But would it just boil down to making the pro-peace decisions, anti-oppression decisions? And is that just basically a Paragon playthrough?

(tried posting this question in the ME subredddiit and it got removed.)