Pacific Islands and Taiwan are done, Czech Republic is done to second level divisions, so if you can find the third level divisions that could be one to do.
The Czech third levels are on the overlays but they're right on the line between very difficult and impossible to draw.
Western Sahara (well, SADR+the Moroccan occupied areas) is on the overlays but I'm pretty sure the border between the two is slightly off, which will make it more difficult to deal with, Morocco itself or one of the Central African countries might be a better choice.
You'll need a program that allows you to make the background invisible, the one we mainly use is paint.net
I believe @tungsterismapping has expressed interest in completing Poland, Ukraine is difficult due to it's size and complexity, European Russia is a bit of a special case in that I have some extra data for it (which'll be available to whoever wants to try to complete it) and it's also very complex, Morocco and Western Sahara shouldn't be too difficult all things considered, Chad is difficult to do properly due to potentially inaccurate/incomplete data, Central African Republic shouldn't be too difficult, I still intend to complete both Congos, and Ethipoia just has some minor data issues
