https://interaktiv.morgenpost.de/kandidaten-bundestagswahl-2017/
The data at hand was gathered before the national elections in Germany in 2017 and sums up all the candidates, their parties, their professions, their genders, ages and places of birth.
It hence aims at comparing candidates and showing their composition. The visualization corresponds to the graphs recommended for showing composition and comparison in the data viz guide. A stacked bar chart, pie charts and different sized circles representing percentages.
It is an interactive visualization. You click yourself through the different categories, hence one does not lose oversight and only views one graphic at a time. The colours of the political parties are always visible as dots. Moving the curser across the dots (each dot represents one candidate) you'll see the name and information of the candidate.
There lies much data and much information in the visualization. I think it managed to reduce the complexity for viewers at first glance. You immediately understand what information is shown and can decide (by clicking further) to see more info about the composition.