I always liked Raffi growing up, I don't think those songs have any capitalist or oppressive themes?
Also songs with nature or animal themes, like "And the green grass grew all around" lyrics here- https://kids.niehs.nih.gov/games/songs/childrens/green-grass-grew
And this one by Kimya Dawson and Antsy Pants - Tree Hugger is wicked cute
Sesame Street?? Must have some fun ones
Seconding little red song book, and also just singing songs you like and you can always adjust for the kiddo's interests or whatever