Referencing @markov00's comment from #2209

I think it's missing the histogram chart, that is best suited for all our time series in kibana as we are, most of the time, showing buckets of aggregated values. The representation is slightly different (the ticks are not aligned in the center of the bar, but start at the left and end to the right of the bar. The histogram also offer a constraint: you cannot have clustered bars but only stacked
see an example here (go to the knob page and enable the hasHistogramBarSeries checkbox
https://elastic.github.io/elastic-charts/?path=/story/bar-chart--test-histogram-mode-linear