James Watson, Francis Crick, Maurice Wilkins and Rosalind Franklin.
Otherwise known as the 'DNA folk' - between them these four discovered DNA.
James Watson and Francis Crick had the idea and Maurice Wilkins and Rosalind Franklin had the evidence, at first both pairs were in upmost competition with each other. It was all thanks to Maurice Wilkins purposefully leaving his office open for the opposing two to find his evidence; the material inside a nucleus of a cell carrying all the genetic information. It's weird to think that the simplicity of it, 4 bases of chemical compounds which pair off can make up everything that's so complex.