I love Endeavour, but that's coming as a somewhat obsessed fan (and owner) of the entire Morse and Lewis series. Endeavour is the prequel to those. The Morse-coroner relationship continues (or rather, introduced) in the later series too, so it was fun to watch how its beginnings were developed in Endeavour.
I haven't watched season 8 yet but am looking forward to it when it arrives on Prime. I don't have the patience to use the PBS app.
I can also recommend the biography of John Thaw (who played Morse) written by his wife, Sheila Hancock, called The Two of Us.