Here's an 2019 updated arrangement of "Oh Christmas Tree" that includes walking bass, right hand solo, some gospelly licks, and other music styles. It's fun to play and great for teachers looking for something hip for their students during the holidays.
This is based off a 2012 arrangement that can be found on Score Exchange where there is also a mp3 link. The tune has been updated to be a bit easier to play as well as fixing some musical issues that have been bothering me for a while.
Here are links to images suitable for printing if you don't like PDF files: