Which Europeans are most similar to the Pre-Neolithic Hunters and Gatherers? The Neolithic Farmers? The Yamnaya Steppe people who came during the Bronze Age?

I'm reading many contradictory things. For the PNHaG, I'm reading that the Scandinavians are from one study, but another study pegs the Basques as the most similar to the PNHaG.

When it comes to the NFs, I'm reading contradictory things as well. I heard that the Basques are very similar to them and so are the Sicilians/Sardianians.

Finally, for the Yamnaya Steppe people who spread IE languages, they contributed significantly to the Scandinavians who became fair skinned and tall because of their admixture. However, I've also read that the Scandinavians branch of IE is Germanic, and this language family is actually a bad example of an IE language. There are many hunter-gatherer words here. For example, "shrimp" is not an IE word, and it is from a pre-IE source. So on one hand, the Scandinavians have a high component of Yamnaya genes, but at the same time, they speak the least IE language as well. Please clarify this contradiction.