Hellwig was the first.
Hogan was big, but had ZERO conditioning compared to UW. There were other guys as big, or bigger...there were other guys as ripped, or more ripped...but, Ultimate Jim was the first to deliver that much of the combination.
Vince used to favor the big guys for his company. Now, a large percentage of them is average-sized adults. Combine that with the fact that they're all trained the same way and handed scripts with what to say and do, it's easy to understand why there is such little interest in the product.