SW & TESB are the only films I wholeheartedly accept as canon. While I also accept ROTJ as canon, I do so only begrudgingly, and only because the post-ROTJ EU stories I consider canon reference the events and revelations of the film too much to make ignoring it sensible.
[JEDIT]
I guess I also consider The Holiday Special quasi-canonical. It’s just too batshit insane for me to discount it.
[RETURN OF THE JEDIT]
I haven’t yet seen Rogue One, just so y’all know.