It would be difficult to answerr this one without buying a copy of every disc ever released anywhere in the world and trying to play it.
I have a Hong Kong spec. Pioneer 505. It has never failed to play any disc completely and perfectly*, any region. I have over 200. It has now been consigned to my cupboard full of old but serviceable equipment.
I upgraded it to a Pioneer 737, UK spec, bought ready-chipped from Sevenoaks HiFi. I haven't yet played all 200 discs in it, but it has never failed to play any of the (probably 100+) discs I have played from regions 1, 2 and 4. I particularly tested it with discs that some people have had problems with.
So, I guess the answer to your question is.....I think so. Pioneer.
(* actually not quite true; lip-synch drift was evident on Lost in Space R1)