Obiwan Sherlock Clousseau

Obiwan Sherlock Cluseau was the first named Inquisitor ever in the Warhammer 40,000 franchise.

Official Canon
Obiwan Sherlock Cluseau is described in First Edition (aka Rogue Trader) as an exposer of psychic misdeeds and genetic deviance, who is well-equipped to a ludicrous degree and having an eccentric sense of style “like most inquisitors.” His name is an obvious combination of the characters Obi-Wan Kenobi, Sherlock Holmes, and Inspector Clousseau, to describe his character as a fusion of all three.

TTS Canon
Obiwan Sherlock Cluseau appears as one of the exiled Inquisitors during the trip to Commorragh. He expresses hesitation with The Fyodperor’s suggestion to not immediately kill the Dark Eldar, but eventually agrees to it under his charismatic aura.