Rank or Conditional Formatting?

I have a subtotaled list of customer's business by brand and I want to apply conditional formatting, or ranking to highlight the top ten customers by brand. For example:

Col G Lists the customer name
Col H lists the 5 different brands (customer name in G repeats)
Col I lists the dollar volume per brand

I want to highlight the top ten customers for brand A, brand B, brand C etc.

Applying conditional formatting to only visible cells could get me there, but I am not having any luck. Any other ideas?

I am open to adding a column to note the rank, or highlight the cells.

This is perfect Jeff, Thank you!

One more thing. After looking at the results, I would like to create another column next to J where we just created the ranking. And I would like this column to read "Brand A 1, Brand A 2, Brand C 1, etc where applicable. Leaving the columns blank if the customer is not rated in the top 10 and tagging each row that contains one of the top 10 customers by brand. Any ideas what this formula would look like?

Thank you!