I'm about 6'3", and 255 pounds. (Down from 280 and still loosing!) and a year or so ago bought a Eureka Summit Large for a summer sleeping bag. So far it has tried to kill me twice by suffocation,

and otherwise does not allow a good night's sleep. It is just too tight across the chest for me to zip all the way shut, and if I leave it open, as I did last Saturday, I can breathe and get cold all at the same time! Plus side; I love it's compressibility. In a compression sack, it squeezes down to just larger than a (American) football. That was why I bought it.
Can anyone suggest a +20F (or warmer) Primaloft (preferably) sleeping bag that will fit a broad-shouldered, big chested, not-as-fat-as-I-used-to-be,

guy like me, that will compress into a small bundle?
Thanks in advance for your suggestions!
Ride safe,
Hans