I am close to your size. I rock an EE convert in synthetic. It is bulky and heavy but it is super comfortable in quilt or bag mode. Plenty of room. Check out montbell. They have some bags with elastic spiral baffles. I like mine. Western mountaineering seems to be the bees knees but they are pricey.
I am a 3XL in Kuiu and Sitka tops. I also have the synthetic EE Convert in long XWide. It’s big and super versatile, it has the full length zipper and can be used as a bag or a quilt. I would think the down version in a 30 degree would be plenty light enough to take on your hunt. Best of luck with your search and more importantly your hunt.
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