Answer: Rutherford
Step-by-step explanation:
Simply speaking,
Democritus discovered the atom.
Dalton gave the atomic theory and establishes that 2 atoms form a compound.
Thompson discovered corpuscles (later called electrons) from his study of the cathode rays.
Rutherford, a student of Thompson discovered the nucleus and proposed an atomic theory that greatly improved on Dalton's.
Bohr did extensive research on particle physics. Bohr's Atomic Theory was an improvement on Rutherford's and this led to his postulation of the Quantum theory.
To me, Rutherford is the important contributor to development of the Screen technologies like TV sets, PC screens and monitors and etc which happens to be the current technology appliances in our daily lives.