I'd say he is... When it comes to Frozen, everyone talks about Elsa or Olaf... And that's it!

This poor guy, I love him to death! <3 His goofy expressions, how realistic he is in being a bit lazy and not being open towards people at first, how even when after he falls in love with Anna he never makes a move on her, how awkward and cute Kristoff can be, how he was up for taking Anna all the way back to Arendelle so he could hand her over for Hans even though he was in love, etc. Sadly, none of these things are really ever talked about in Kristoff. I don't think he gets much attention or praise he deserves in the slightest.

He gets enough love.

I think he is underrated