One is missing from here. Asteroid Apophis. It will fly by earth in 2029 and 2036. Scientist believe it will not hit earth. But what could happen is trigger a massive earthquake around the world and cause tunami in my opinion. Maybe change the way the land is. You know, remember 200 million year ago earth was just one huge continent called the Pangaea, then thing went arwy due to earthquake? Who know, I could be wrong.
Apophis is a tiny fraction the size of Chicxulub. True, it could still trigger massive tsunamis or earthquakes, but hardly the apocalyptic impact of Chicxulub. Anyway, as you point out, Apophis is almost certainly going to miss Earth.
The Earth's crust is moving all the time - it's called continental drift. It's a continuous cycle of continents coming together or splitting apart. It's not some single earthquake that causes this. The last supercontinent was Pangaea, and we are heading for another one in a hundred million years' time, which some call Amasia.