Davidy,

That will be, in my opinion, your best bet. You can easily summarize the
data and once that it is done, simply right-click on the row field and select
the option Field Setting and the click on Advanced. There you will have the
option to list the top 10, top 15, top 20, top 5, or literally anything
really.

And all that wil only a few clicks and now messy formulas.