Tesla was truly one of the inventors. Marconi was the most successful Radio Entrepenure perhaps till David Sarnoff (RCA). Marconi was one of the original RCA founders with GE, but kicked out by US government.
RCA bought Victor Talking Machine Co. Which in UK was HMV and in Japan JVC. When in 1928 UK Columbia Graphophone was taken over by HMV, the holding company was EMI.
The US part of Columbia became CBS.
Hence when Marconi wanted to divest the loss making domestic Radio and concentrate on Marine & Industrial, RCA (Sarnoff) encouraged him to licence Marconiphone name to EMI. Hence HMV and Marconiphone models in 1930s pretty much identical. Also why EMI and RCA collaborated on the Electronic TV. especially the camera, which defeated Farnsworth (his was inherently rubbish) and Baird, who at least came up with electronic film scanning, but otherwise didn't invent TV as his Mechincal TV was a Victorian era invention.
Bairds film to TV system was used in Satellites before suitable CCD cameras. The film was developed and then slowly scanned and transmitted.