What do neo-soul innovator D’Angelo, “Lady Marmalade” Patti LaBelle, guitar god John Mayer, “Shout” singer Ronald Isley, and gospel great Smokie Norful all have in common? Well, outside of being exceptional artists in their respective fields, they’ve all had the fingerprints of star session guitarist Isaiah Sharkey on their recent tours or albums (including a multiple Grammy winner) in the midst his steady ascent as an esteemed solo artist.