Phil Spector produced music which meant a lot to a lot of people. Still a murderer.
Harold Shipman Saved the lives of thousands, yet should always be labelled a mass murderer because he knowingly positioned hundreds.
Probably not though, I don't think a typical GP saves thousands of lives
It really was a two-man team that discovered nitrogen fixation - the other being not Carl Bosch, but Robert Le Rossignol who assisted Haber in developing his bench-scale nitrogen fixing reactor. Carl Bosch led the team that scaled it up, and that was a large effort of hundreds of people.
