Wow, impossible question. I will randomly pick the original Wailers "Small Axe."
But it could be Perry's "Roast Fish and Cornbread." Or, "Police & Thieves." Or maybe Lopez Walker's "Send Another Moses?" Or Third World's "Brand New Beggar" or "Freedom Song?" Or any Dub by Scientist, Perry, or Niney?
Alpha Blondy's "Come Back, Jesus?" Or African Stone's "Run Rasta Run?" Misty's "Six One Penny?" Anything by Peter Tosh? Toots & the Maytals' "Funky Kingston?" Culture's "Old Tattoo" or "Capture Rasta?"
AaaRrrrGgghhh!!!! There's just way too many...
GJ