Yeah, all of your replies to this post are excellent and valid, thank you so much.
Yes, I can accomplish what I want by adding "Custom Graph" widget to my dashboard, instead of "Table" widget. That allows me to define custom tokens with names of my Linux servers depending on the method of data collection and then select different DSs and different Datapoints in my Custom Graph definition. Then the Top 10 servers display works, as intended. Heck I can even throw in a Windows server in there, it still works.
Yes, it's a PITA since now I am looking at creating the dashboard from the scratch instead of using the one for Linux ssh devices. Plus, I cannot use the fancy "Show color bars" and "Enable Alert Forecasting" features of Table widget. Oh well.
Yes, Stuart, the feature request for "metric families" would be an ideal and welcome feature for these type of dashboards.... Alas, I don't think it's a trivial feature to add, therefore we will not see it anytime soon, and I need to get this done today. But thank you!