1) Copycat 2) Me too kind of guy 3) Mimic 4) One who does the mimicking 5) One who repeats 6) Parrot 7) Parrot, often 8) Resounder 9) Shout in a cave 10) Singer making a comeback 11) Unoriginal sort 
• (n.) One who, or that which, echoes.
Ech'o·er noun One who, or that which, echoes.