I missed most of the late 1800s (Abbott, Thompson, Bowell, Tupper), Meighen, and Louis St. Laurent. I should have known Laurent since he's much more recent but I honestly have no idea who he is. I'm a little embarassed about that.
I was surprisingly brutal at the US states one. I only got about 60% of them before I quit. Did a bit better at Europe, about 75%. Periodic table? I only got about 15 of them.
Good find!