Right now on my site you can go to the main WoT table, filter for hops 2 or more to see pubkeys you’re not following, and then order them using several methods. I don’t have a column for precisely what you’ve suggested but it would be easy enough to add - perhaps I will do that.

Although if I may suggest: I think the spirit of the GrapeRank influence score is very closely aligned to what you’re asking for, and probably produces a very similar list (if not exactly the same).