I'm currently running Ubuntu 16.04. To keep my story short: I'm trying to play a game in WINE fullscreen, but actual fullscreen mode for this particular game crashes too much, so I'm running it windowed at my native resolution. However the Unity bar and launcher are both visible when I do this, so I want to install a secondary DE just for WINE games (I'm thinking Xfce because it uses GTK+2, which hopefully won't interfere with anything to do with Unity's GTK+3).
I know it's as simple as
sudo apt install xubuntu-desktop (or whatever the equivalent is for the DE I will choose), but I once tried this with KDE in 14.04 and it caused considerable problems with the visuals and functionality of Unity (Qt would override GTK+ visuals, Nautilus would crash at launch, etc.). Do you have any tips for installing a second DE that I can switch to at login without interfering with the stability of Unity? Am I correct in assuming that Xfce will likely cause the least amount of difficulty?