Agreed. The underdark portion of his life would make for and excellent TV adaption.

HOWEVER

I don't trust the current climate of TV production to pull it off properly. In all likelihood, if produced today, it'd end up as a Netflix series (or similar series) where the streaming format would throw off pacing, and after completing a season of sticking to the story, any subsequent seasons would stray far away from Salvatores stories in an effort to have mass appeal.

I think it would have worked 15-20 years ago. Not before, as the CGI necessary wasn't there yet. Not later because formulaic streamability would ruin it (along with Netflix-lighting, ugh).

Maybe it would work again at some point in the future once the current trend of algorithmic slop has gone away.