I'm not sure how big the guys above are that responded, but I'm 6'4" and have boated as heavy as 280...that said, you're a bag of dog food heavier than me with bigger feet. And I've been looking for a new boat.
mamba, jefe 72 gallons. Too small for me, it'll be too small for you.
The large nomad is 78. Getting close.
The Burn is 80. Large size, interested to try it.
The biggest boat I can find new is the Prijon Hercules (82 gal). I know Alpenglow has one on their showroom floor...if you can find it in the maze of everything else thats on the floor. (if you've cleaned the store up in the last couple weeks, my apologies.)
Go in there and see if you can fit in it.
I don't think there are any playboats that'll float you/you can fit in. Super Ez is probably 40 pounds away for you...