I have thought of Herrero before, being one of very few (and limited in scale and time) examples of European genocidal practice (in 20th century, though). Albeit some may argue that the goal of the Germans was not to exterminate Herreros, but to force them into submission, and the target were not Herreros as a whole nation, but merely a rebelling group of Herreros (Herreros still live in large numbers in today's Namibia). Never mind, it was a crime against humanity, an act of genocide, and a point for you.
As for the others, all of them Amerindians, we should clarify something first. Some of them actually extinguished after European conquest, others decreased in numbers significantly. The question is: Was there ever any intention to exterminate them, or was it rather the diseases that took their toll? I think the latter is the truth. There's no denial that Europeans treated those people violently, but why? I believe it's clear they wanted to subjugate (and Christianize) them, and did not want them dead. They would prefer them being labourers on their estates. But, unfortunately, Arawaks extinguished completely and only very few Caribs survived (on islands, more of them still live on mainland).
Then there are cases which are represented by Wampanoag in your list. These were very small nations, often decimated by a single outbreak of disease. These things happen without any conscious human action. I could name some Slavic small ethnographic groups in present east Germany who disappeared at about the same time. There was no urge to extinguish them, yet they got assimilated within the prevailing society. And that was also the fate of Wampanoag. They live until today, it's only their culture they lost (incl. language).
So, we have found one example of European genocide, which occured very late from the point of our discussion. It did not contribute to European superiority in the least. It was an exemption to general rule that Europeans did not seek extermination of subjugated nations.