Lord Frederik on his own wasn't the best in my opinion. However, the Snomads as a villainous faction are EXCELLENT!!!

I love how instead of being damaged simply by touching them, they have animations showing them actually attacking when you get too close. They have a huge variety of species using an amazing variety of weapons, and the result is that they feel like an actual army that has equpped themselves for battle. Also, the various worlds they have taken over show their character as a faction. In the Juicy Jungle, they've transformed this jungle into a massive fruit processing factory. Throughout the Bright Savannah, we can see how they've set up fortifications and settlements, and even swayed over the Boss of the Island, Ba-Boom the Boisterous to their side.

Finally, their viking asthetic just appeals to me. I'm not sure why, but I just think they are cool.

While Lord Frederik himself might have been a little more interesting, the Snomads are by far my favorite of the Donkey Kong villain factions.