Lewis Zimmerman

Considered to be the father of modern holography
2361: Assigned to the Holo-Programming Center at Jupiter Station
2360s: Created & developed the Emergency Medical Hologram
2373: Promoted to Director of Holographic Imaging & Programming at Jupiter Station
2375: Tried to create a Long-term Medical Holographic program, Starfleet shelved it
2376-2378: Created the EMH Mark II, followed by the Mark III & Mark IV
By 2377: Was terminally ill, cured by Voyager’s EMH