Tesla was weird. I guess you have to be extraordinary to do extraordinary things. Einstein was also big on imagination, but I guess with none of the weird stuff. Another two interesting figures are Jack Parsons and Konstantin Tsiolkovsky. Jack was heavily involved in the occult and followed Thelema which was founded by Aleister Crowley which included lots of sex magick and the like. Konstantin Tsiolkovsky is one of the founding fathers of modern rocketry and astronautics, and he claimed to be speaking to extraterrestrial beings from time to time who would give him information.