4.086 out of 5 from 54 votes
Hikari Hamura, nicknamed Picasso by his peers, always has a pencil and sketchbook in hand. Though he used to spend most of his time with his only friend Chiaki by the river's edge, things changed for the boy forever when a helicopter crashed on top of them, killing Chiaki and leaving him virtually unscathed. Upon awakening, Hikari is told by Chiaki's spirit that he is alive because she prayed for his safety, and in return, he must help classmates in need with the power of his sketchbook, or his body will rot away. Now, with the help of his angelic partner and his artistic skills, Hikari must help save his fellow students, gaining plenty of friends along the way.
Both manga have a main character with special powers that sets him apart from his peers, and they use that power to help people or solve tricky situations. Sakamoto has more comedy and Genkaku Picasso has a lot of focus on psychology they're both pretty episodic and feature a lot of odd school antics with rather odd male leads.
Both manga are about male highschoolers with very mysterious powers and how to use them to get out of tricky situations. JoJo has action and a more serious tone while Sakamoto desu ga? is pure comedy, but both are so over the top and full of cool poses and great art that I think they're sufficiently similar to warrant a recommendation.