Is that really not everyone?

Who is an engineer that excitedly looks forward to that final 10% of polish and maintenance? (I do it because I look forward to shipping things, and ofc pay)

What engineer enjoys routine work? Oh, lovely, I'll go and clean up comments in the code today... for a tenth day again.

The only distinction that seems to make any sense seems to be that they are "good at solving" all kinds of problems.

I'd call those "good engineers".

Edit: I seriously hope you are not looking for "10x engineer"!