Bigger than Mule is the Hawg, but it’s very big really. Depends what you want to carry. I used my Hawg for years and had half a bike shop in the thing, but then realised I generally don’t need all that. So got an Osprey. viper 7, which holds very little but I wanted something that would discourage me from taking much stuff on a ride.
I like the Hawg though for when I do want to take lots of stuff. Particularly if I shove the SLR in there. I use it more for skiing these days though. It does compact down if there’s less stuff in it.
The NV stuff is just more weather proof I think, and mine had a harder back.
Not used an Evoc but from those I’ve seen they have more volume but there’s no organisation inside, just big empty space, and don’t seem padded.