Here’s a laundry list. Some to a greater extent, some to a lesser. Some as cultural assimilation, some as more straightforward displacement.
- Pelasgians (or whatever the pre-Hellenic population of Greece was)
- Minoans (who are presumably the same as the Eteocretans)
- Eteocypriots
- Lemnians (assuming that their language, which looks related to Etruscan, is not Pelasgian)
- The indigenous peoples of Western Asia Minor (probably): Phrygians, Lydians, Carians, and all the others
- Celts/Galatians (there are red-headed Greeks and Turks)
- Jews (Romaniote, Sephardic, Italkian)
- Romans of sundry provenance
- Goths
- Avars
- Arabs (the Cypriots are more sanguine about admitting this than Greece Greeks are)
- Slavs (certainly the ones that went down south all the way to Mani)
- Albanians (as Arvanites)
- Vlachs
- Probably not the Roma, given the ongoing prejudice against them
- French
- Italians of sundry city states (Venetians, Genoese, Florentines)
- Catalans
- Probably not the Turks; it was likely the other way round, through conversion
- Bavarians (the ones who came down with King Otto)
- Armenians
- The modern-day migrants, whose assimilation is ongoing