Base R plot() can also be pretty powerful[1] and look great.[2] As an alternative to ggplot2 I would also propose that Vega Lite[3] could be a contender, with an excellent cross language ecosystem.

[1] http://karolis.koncevicius.lt/posts/r_base_plotting_without_...

[2] https://github.com/KKPMW/basetheme

[3] https://vegawidget.github.io/vlbuildr/