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That seems too vague, Green Lantern was enlisted into a space cop program due to his good values, Eddie was angry with Spider-Man as was the symbioite and was at the right place at the right time. Also the power ring is not a life form. At least, last I checked it wasn't, you know how comics are, maybe it is now.
YouTubers seem to be suggesting one of the Kill la Kill girls. I guess that thing they wear is a parasite, if what I've garnered from the series without really watching much of it is correct. Feels out of place having Venom fight anything anime, personally, and I'm not aware of any decent 2D or 3D options for Kill la Kill members to show. Venom seems stronger, more durable and able to heal any wounds I've seen from Kill la Kill, but I've only seen the first episode and some tennis match filler episode, so I wouldn't call myself well versed in what they do.
Also I just don't like the series. So I would prefer something else. But for the time being, the common trait being a symbiotic superpower-granting living alien suit between those two are the best I got.