"Brother" Jack McDuff, immortalized in Pat Martino's tune "MacTough", was a hard-driving jazz organist.  His early trios and quartets features luminaries such as George Bensoin and Red Holloway.  A friend of mine referred to McDuff as the Art Blakey of the organ, an assessment that is not far wrong.  He recorded extensively for Prestige, Atlantic, Blue Note and Cadet.