I think his fights with Browne, Nelson and Cain he showed high potential and smart offence. He was super athletic in that short time frame and used it well. He got battered by Hunt but that's just how HW goes, nobody can be flawless against all styles at the top at HW, he also held his own with Overeem.
Fedor would maul him standing every single time, throughout their careers because of the styles and Werdum could move slow at times while Fedor was probably the fastest HW.
Not saying he's the better striker but I think he's close (The Stipe fight is a knock but I don't think he trained for that fight)