I doubt anyone knows who the earliest residents of Sardis were but there likely were Greeks there before The Lydians. Interestingly, they might not have been Ionians but Macedonians or Thracians, people sometimes not regarded as Greeks but definitely of Greek descent racially and speaking Greek.
The Greeks were invaders and colonizers in Ionia, displacing or absorbing the earlier inhabitants. Sardis was quite a ways inland and thus wasn’t a likely target for Greek colonization. Greek colonies, without exception as far as I know, were seaports.
Macedonians were ethnically similar to Greeks and spoke a related language, but till well into the Hellenistic period any “real Greek” would have disagreed with you about their being Greeks. They were “wannabee Greeks.”
The Thracians were not Greeks, either ethnically or linguistically.