This man deserves to be talked about more often! I wouldn't say he's underrated but i've never seen anybody say he's one of their favorites or post anything about him before :
THE HARD BOILED DETECTIVE! | Gintama Episode 84 & 85 Reaction | Anime Reaction - YouTube
Gintama Review: "The Hardboiled Detective Arc" (GARS, Part 8/62) - YouTube
Manga Review: Gintama (Hideaki Sorachi) – Morning, Roo