Boyz II Men
Based on sales, Boyz II Men is the most successful R&B male vocal group of all time. It has recorded five #1 R&B hits between 1992 and 1997 and has since sold more than 90 million albums and 50 million singles. Three of its #1 hits, "End of the Road", "I'll Make Love to You", and "One Sweet Day" (with Mariah Carey), set and broke records for the longest period of time a single remained at #1 on the Billboard Hot 100.