Re: Where's Rutherford?
I thought J. J. Thompson discovered the electron. Didn’t Chadwick discover the neutron? But yes, all of them - Thompson, Rutherford, Chadwick - diserve a mention.
Thompson is also notable for his role as a teacher to the next generation of physicists (according to Wikipedia) including Rutherford, Neils Bohr, Max Born and William Bragg.
I think I’d still vote for Maxwell though. His unification of physics (i.e. light is an electromagnetic wave) was something really significant, and with lots of practical consequences. Also, unlike the three nuclear physicists above, his memory is not tainted by the use of his discoveries to kill people (see also Alfred Nobel).