Start with....
The Belltones - No More Heartaches (Harry J) Harry Johnson used Coxsone's studio, if i remember rightly, for this.
Larry Marshall - Nanny Goat (Coxsone Dodd)
Lee Perry - People Funny Boy (Lee Perry)
Leslie Butler - Revival (Sonia Pottinger)
The Maytals - Do The Reggay (Lesley Kong)...Only included as is often quoted as being the first reggae tune, but is not.
In parentheses are the producers
.....there are a few more reggae tunes after this. I will post them if I have a few minutes.....