The creation of the earliest known atomic model is credited to John Dalton. It is commonly known as the Hard Sphere Model. In this model, the atom is depicted as being a completely solid sphere that does not have any additional internal or external features.
Its successor would have to be the Plum Pudding Model, its creation credited to J.J. Thomson. This model depicts an atom being composed of positively charged and negatively charged subatomic particles that are evenly distributed throughout the atom's interior.
Perhaps the most important innovation made in atomic models is the Empty Space model which was created and proposed by Ernest Rutherford. It was made based on the results of Rutherford's Gold Foil Experiment, which concluded that an atom is mainly composed of empty space and has a small, dense, and positively charged center (the nucleus).
Bohr's model was named after its creator, Niels Bohr. This depicts the atom as having small and negatively charged subatomic particles (electrons) traveling around its center (the nucleus) in varying circular paths, or energy levels (called orbitals).