Assuming that Sacramento isn't a playoff team this year, here are the non-playoff losses from the top teams in each conference

Golden State (7): Losses to Dallas x2, LA Lakers, Phoenix, Miami, Minnesota, Memphis

Portland (8): Washington, Miami, LA Lakers, Minnesota, Dallas, Memphis x2, Sacramento,

Denver (7): LA Lakers, Memphis, Chicago, Atlanta, Phoenix, New Orleans, Washington

Houston (10): New Orleans x2, Washington, Dallas x2, Minnesota x2, Miami, LA Lakers, Memphis

Philadelphia (10): Memphis, Cleveland, Washington, Atlanta x3, Sacramento, Chicago, Dallas, Miami

Milwaukee (9): Memphis, Phoenix, Chicago, New York, Miami, Washington, Phoenix, Cleveland, Atlanta,

Toronto (4): New Orleans, Cleveland, Chicago x2