Mark Griffith - AKA RCHacker
RC Hacker never gained a large following in the RC community, but he did have lots of interesting projects, the first that I saw was his video adding a PS2 joystick to the back of his Turnigy 9X, I finally did this modification to my own transmitter 6 years later. He also did many videos on antenna theory (where I learnt about the moxxon antenna I have built so many of) and antenna testing. His most popular project was his ‘nonacopter’, a multicopter with 10 motors, some which rotated, allowing the craft to move in all 6 axis (3 rotational axis and 3 translational axis).
Unfortunately, since he finished the nonacopter project in late 2015, he stopped posting RC related content in favour of his bird watching hobby.
Incidentally, his birdwatching YouTube channel, and the mods that he did to his photography equipment, persuaded me to buy my Canon Eos M camera in 2014, which I still use today, after completing many of the mods he did to his.