How does this sound? Directed by Giancarlo Santi who was Sergio Leone's second unit director on Good, The Bad & The Ugly and Once upon a time in the west. Written by one of the most talented and prolific Italian writers Ernesto Gastaldi. Who brought us many wrote many fine Westerns such as Day of Anger and My Name is Nobody. What might interest you is Gastaldi was more well known for writing Giallo's.
Such classics as Torso, The Case Of The Scorpions Tail, All the colors of the dark and The Case of the Bloody Iris to name a few. He also wrote the hard boiled crime classic "Kidnap Syndicate" for Fernando Di Leo. Then add in the always impressive Lee Van Cleef and you have one of the best and maybe one of the most single handily underrated spaghetti Westerns of all time! Even Quentin Tarantino used Luis Enríquez Bacalov theme for the film very effectively in Kill Bill Vol 1.