Gary Valentine, originally Gary Joseph Knipfing from Mineola, New York, is the brother of actor Kevin James and has German roots. Beginning his career in stand-up comedy, Valentine soon gained traction in Los Angeles, making appearances on renowned talk shows like The Late Late Show with Craig Kilborn, Late Night with Conan O'Brien, and The Tonight Show with Jay Leno. He's notable for his nine-season role as "Cousin Danny" on CBS's The King of Queens and has also contributed as a writer. On TV, he's been featured in Men of a Certain Age, a Ray…