Some of what Lawrence says I interpret to be the very tongue-in-cheek things someone might say that are just over the ridiculousness of it all. Like I thought his "See? Women can be useful." line as playing to the room, rather than something he really believed, since he earlier made a point to June that he helped Emily because she was smart and can help mankind. He can't help everyone so I think he really is one of those "pick the battles that matter" type of people. Like the prisoners: he worked to get 5 saved because that's all "they" would allow, now he was stressing over which 5 were most important to save. (And maybe he even, in a round-about fashion, was telling June - "pick the 5 that will help you").
Anyway, he is fascinating. He's not purely evil, since he could have turned June in 6 times over by now, not to mention he never had to take her in, in the first place. But he's not really purely altruistic either, given his rant about June being an adulterer and pointing out that incident with her daughter being sick at school while she was at work that one time. (Seriously, what kind of database does Gilead have access to... or were pro-Gilead folks already taking notes on everybody before the coup.)