Just off the top of my head…
TPM: Anakin, Obi-Wan, Yoda, C3PO, R2D2, The Emperor, Greedo (deleted scene but point stands)
AOTC: Boba Fett, Anakin, Obi-Wan, Yoda, C3PO, R2D2, The Emperor
ROTS: Chewbacca, Luke, Leia, Anakin, Obi-Wan, Yoda, C3PO, R2D2, The Emperor
TFA: Rey, Finn, Poe, Kylo Ren, Phasma, Snoke, Hux, BB8, Maz
Yep, new characters in the PT, same old reboot characters in TFA…