He is probably connectable even though he didn't marry or have known descendancy because he was technically a clergyman. For instance Roglo shows his brother Claude is a direct ancestor of Napoléon's wife Joséphine through her paternal grandfather, who is on Wikitree.
The question is to know if all of those profiles would be properly sourceable. 16th century sources are tough. Also, adding his brother would require adding his parents, and that would require a pre-1500 certification (which I don't have, and I don't think a lot of active French members do but I might be wrong.)
If you create his profile, please be aware his LNAB should be "Ronsard", with CLN "de Ronsard" as per naming guidelines.
Location fields might be a bit tricky because they should include time-appropriate historical provinces, but they can be corrected latter on with no issues (unlike the LNAB which takes resources to correct, which is why I insisted on it.)
If you're confident you can provide adequate sources, I don't see any reason why you shouldn't create the profile. He's a notable poet and post-1500 so he should definitely have one! I'm a bit more worried about sources for the rest of the profiles needed to connect him, but though it sounds like hard work, it doesn't seem impossible at all.