Awesome list! I should give Pole Position and Yie Ar Kung Fu a try sometime. When I think about influential games, I think less about those that started a trend and more about those that popularized it. Here are some that come to mind:

Street Fighter II: this one created the fighting game craze that still exists today and now, we have tournaments and professional players who play fighting games for a living.

Dragon's Lair: this game blended animated movie footage and QTE (Quick Time Events) mechanics and since then, we've had FMV (Full Motion Video) games like Mad Dog McCree and QTE-based games like the God of War series.

X-Men: this is one of the few games that allow up to 6 players to join and even though the beat 'em up genre isn't what it used to be, the 90s saw a lot of multiplayer co-op arcade games.