you use sales to justify smash bros, yet f-zero can be niche and still be on the list? according to
wikipedia, tekken, sf, and mk all beat smash anyways in terms of sales. also, i would think those sales don't even include arcades, which all 3 of these franchises have been a big part of.
tbh, other than xenoblade it's hard to label these franchises as iconic to their genre because they like to bend the rules a lot. iconic fighting games will always be traditional ones like sf and tekken, iconic racing games, gran turismo and need for speed, and iconic rts games starcraft and age of empires.