For those keeping score, this year alone, just off the top of my head
David Bowie
Glenn Fry
Maurice White
Paul Kantner & Signe Toly Anderson (both of of Jefferson Airplane on same day oddly)
John Thomas
George Martin
Keith Emerson
Lonnie Mack
Prince
Jimmy Van Zandt
Scotty Moore
Fred Hellerman
Eddie Harsch
and now Leonard Cohen. Gotta be forgetting one or two big names, I sure.
and it was practically 2016, last few days of 2015 when Lemmy died, too, so music's taken quite a hit in the last year.