I would go with the wave as well as one of, if not the first, "wakeboard boats." I would define a modern wake boat as a boat with a tower, speed control, specific hull tuning and other wake enhancing features such as ballast.
With that said, I have to laugh at what some folks say about non wakeboard boats... on this thread and many others on the forum. My last boat was an 07 Bayliner 185. It had a factory option tower but I opted for an aftermarket Monster tower. That boat threw a decent wake... sure it's not as big as the Mojo by any means and it certainly is easier to maintain speed with the cruise and a much heavier boat. I don't like to see people hate on Bayliner any more than I like to see elitist wake boat owners hate on Moomba. My Bayliner was about 1/4 the price of my Mojo, had ZERO warranty issues over the 7 years we owned it and provided for years of fantastic memories. Not saying I'd ever go back though 
Point is, there are people that are probably better behind pontoons and outboards than the majority of us on the forum are behind our true "wake boats." I'm not anywhere near decent status that's for sure... and I've more or less moved on to my new love of wake surfing!
2022 Moomba Mojo
2013 Moomba Mojo 2.5 (sold)
Tow - 2019 Ford F150 Ecoboost