Lets take a look at this Microstrategy Dashboard. The top section houses three dials and they are very informative despite taking too much of screen real estate.
For e.g the First dial shows a descriptive text “2006 Revenue growth of 29.4% compares to a target of 22.7%”
It would have been more useful if the target was somehow etched on the dial scal. This would eliminate the need to read the text below.
Remaining charts focus on Revenue,Forecast and Variance. Having a combination of Tables and charts on dashboards is a better approach than all charts or all tables in a dashboard.