Top 5 R&B, top 10 US. Legrand operated from Norfolk, VA, a long way from New Orleans.
Big Boy Myles [with Mac Rebennack's band on Ace; answer from the real New Orleans]
Johnny Hallyday [as A New Orleans]
Louisiana Gator Boys & The Blues Brothers Band [in film Blues Brothers 2000]
Jeff Beck [with Gary U.S. Bonds]