A while back Simon Jackson and Kara Woo shared some great ideas and graphs on grouped bar charts and density plots (link).Win-Vector LLC‘s Nina Zumel just added a graph of this type to the development version of WVPlots.
Nina has, as usual, some great documentation here.
More and more I am finding when you are in the middle of doing something, having a ready made plotting tool is less distracting than working directly designing a
ggplot2 graph on the fly. In addition to WVPlots other great “ready to go” plot packages include ggpubr and ggstatsplot. I definitely recommend checking out all three packages and the packages/tools they use.