Funnily enough the only "bespoke" Intel chip in recent times was Intel's own i7-8705G & i7-8809G used in the Hades Canyon NUC that replaced Intel's HD graphics with an AMD Vega M.
Which was an amazing chip. The Vega M + Intel cores combo delivered the graphics performance that Intel has been promising for years now. Would have loved to see a chip like that power the next few generations of ultrabooks, MBP's, etc.