Does anyone here know if there is any octa-core TV Boxes out there other than the Amlogic S912? Whether it is supported by CE or not does not really matter.
CE only supports Amlogic S905/X/D/W and S912 at this time.
I think this is a good list of android boxes
From the list you provided, it looks like only Amlogic S912 is octa core.
BTW, has anyone seen a Android smartphone with 10-core CPU?
What do you need all those cores for?