P.J. Plauger claims that Whitesmith C was the first commercial C compiler. It ran on Unix and Whitesmith's Unix inspired Idris, CP/M-80, VMS, and a bunch of the other PDP-11 operating systems.
Aztec C would have been an early micro compiler running on CP/M-80, Apple II, MS-DOS, and I think a number of other systems. The Amsterdam Compiler Kit was written before C compilers started proliferating but was not commonly used. After that, there would be a new compiler, often from a new company, announced every few months. Some even managed to stay in business long enough to fulfill orders. Good luck sorting that into any accurate order.