Height/legs is going to be the issue I feel like. I've seen a few videos of some fluffier people, because I am one, but most are like 6'0 or under and similar weight or less. I can tell you I was 6'1 350 at Islands and Universal and struggled. Could not do escape from gringotts, hagrid, mummy or forbidden journey. I am just under 300 now, and had no issues last time on hagrids, mummy or gringotts. Forbidden Journey was still a no go for me, largely due to my shoulders being broad as well (former football/rugby player). I will. be at
epic in a few weeks and can give you my feelings on it (going June 18-21st). I wont be the ideal test candidate for you, but may be able to give you a gauge at least.