These charts do not fit neatly into other classifications.
Boxplots build a visualization that shows you the distribution of a required Y axis column, possibly broken down by the bins of an optional X axis column. The Y axis column must be numeric, the X axis column can be numeric or text.
The 2D Distribution chart builds a visualization that shows you the bivariate distribution of a required X axis column and a required Y axis column. Each column is binned and the resulting cells are colored by the relative density of rows in that cell.