The N64 is absolutely dwarfed by the PS1 with respect to the number of awesome titles. Anyone who places the 64 over the PS1 or even the Saturn hasn't properly played them. I'll maybe make an exception with the Saturn going by OP's definition of various attributes (N64 sold more than Saturn, but mostly because the Saturn tanked in the US). The PS1 though kills it on so many counts. Not only did the PS1 outsell the N64 3 to 1 worldwide, it doubled US sales, too. Mario may have been a big hit still, but more people were itching to play Final Fantasy VII (a game I don't even like), Metal Gear Solid, Twisted Metal, Gran Turismo, and Tekken, to name some of their biggest hits. For every great game on the N64, there were two on the PS1. And even today, it holds up extremely well, with awesome fighters, shooters, and RPGs, all of which weren't really feasible on the N64 (or more likely were ignored by companies and even Nintendo itself).
That said, I'm not one of those haters who craps on anyone who likes the N64. I just know what is top 10 material and what isn't, and the N64 isn't.