Total Recommendations: 3
Both Series take place in the age of where Technology isn't develop very far yet, though D.Grayman takes place in the early 18th century as both main characters are short and hate being called short or rather hate being called Bean Sprout, join Allen Walker as he joins a organization that is similar to a army of special people called Exorcists much like State alchemists, as the organization known as the Black Order tries to defeat a rise of the supernatural army as Allen like Edward has a traumatizing past that follows him wherever he goes as its literally on him reminding him of his past. as he tries to find the way to stop the demons known as Akumas from taking over and destroying human kind
If you like to see Giant Robots in a whole different Perspective, and see Development at its best, then i would recommend Gurren Lagann. Join Simon, Kamina, and Yoko as they battle against oppresive forces.
Both series have a gunslinger who is a pacificst and don't like fighting, and both of the protagonist are blond hair as well, and both the protagonist have almost unparrell gunslinging abilities well, only a slight few differences is there a little more fanservice then Trigun, but still join Rushina Tendo as she travels to find the path of making peace without killing