Which 4/3 camera is best for macro

So far, in cameras I've borrowed, I haven't been happy with macro results, but none had dedicated macro lenses. I like an Electronic viewfinder, but macro is my passion. Have only gotten results decent printed at 8x10. I shoot raw, am fussy, but may may not be handling this right with the 4/3 format. Would appreciate guidance! Thanks!
--
Page Simon