The Kawasaki Mule FXR, all of the single row seating Side by Sides of all makes have a bit more legroom, I am only 6'5" with a big belly, as in 300+ lbs and my TransMule 4010 barely has enough room. Part of the trade off is the bigger the cabin the smaller the bed.
The Kobta single bench seat is a beast, pricey, and the diesel is a bigger beast and more pricey. But heck, everything is ridiculously expensive these days.
Good luck, I bought my first Mule in 1998, wrecked it in 2011, and the replacement is better still. Fuel injection and power steering is great for a 75 year old fat man. I expect this one to last the rest of my life, but I must have one. 13 years is a good long time to own anything mechanical, but my tractor is 40 years old, my pickup 20. I am not one to give up a vehicle just because it has some age to it. I have never known a man to regret buying one.
Again, Good Luck