If you listen to Satoshi's image song, you notice how surprisingly hot blooded he is. He equals Keiichi.
Well, Satoshi acted similar to Keiichi in Onikakushi-hen according to Rena meaning they can't be too different.
Speaking of Rena, when she isn't really sweet/calm or under the Hate Plague, or someone is hallucinating her being maniacal. She is just as Hot-Blooded as Keiichi. It really shows in the Minagoroshi manga and sound novels.
In Umineko no Naku Koro ni, being Hot-Blooded sometimes seems to be the most reliable way to do magic. The main character, Battler, in particular, can be particularly so. Here's just one example, near the end of the clip (The footage beforehand can be rather disturbing to those who are unprepared, and to some who are. If you wish to be safe, just skip ahead to 3:47).
Koujaku from the BL VN DRAM Atical Murder, whose specialty is riling up all the seemingly stoic people he meets as soon as he meets them because he thinks they're up to no good (he's, perhaps unsurprisingly, right about this). Which is basically every seemingly stoic character in the game (there are a number of them).
Ishimaru from Danganronpa is an interesting case of a Hot-BloodedClass Representative who's VERY SERIOUS about order and discipline and following the rules. He gets even more Hot-Blooded (and foul-mouthed) when he's possessed by Oowada's spirit (or just goes crazy.)