Manolis Chiotis – was a Greek rebetiko and laiko composer, singer and bouzouki player. He is considered one of the greatest bouzouki soloists of all time. He invented the four-course bouzouki (tetrachordo) and introduced the guitar-like tuning.
Rosa Eskenazy was another rebetiko female vocalist who was just as unconventional in her life as Sotiria, however her movements were more theatrical and calculated, she came from a family of professional musicians and her style is informed by that history. Much of her music was composed with many instruments in mind, oud, violin and classical orchestration in general, hence she receives more credit in academic and sophisticated music circles, unfair as that may be.