Re: Where's Rutherford?
And add in James Chadwick, who discovered the electron.
John Dalton should be there too, as the first scientist to put atomic theory on a usable basis and make it the foundation of chemistry.
However, atomic theory was all a bit theoretical until Chadwick discovered the electron, proving that the were smaller particles than atoms, and Rutherford discovered that the atomic nucleus existed and was very much smaller than the atoms that contained them. This led directly to the Bohr atomic model and so to modern nuclear physics.
As far as I know none of the three - Chadwick, Dalton and Rutherford - have much recognition outside science: none are as well known as they deserve.