Wanted: really invasive perennial

I have a small bank beside my drive way that is in light to part shade. 
The people who lived in our house before planted it with blue rug juniper
and yucca plants.  The junipers have not filled in yet like they are
supposed to, and the bank is being overtaken by weeds.  I have a massive
colony of ground ivy, dandelion, and clover that I can't eradicate.

Can anyone suggest a perennial to plant there that would take over, fill in
quickly, and give the ground ivy a run for its money?  Or should I just let
the ground ivy have the bank like it wants?

While I'm on the subject of perennial weeds, has anyone ever had any
experience with a member of the gerenium family called "Herb Robert."  It
looks a lot like wild geranium but has a peculiar odor.  If anyone has any
experience with this perennial weed, please email me privately so I can ask
a few questions about it.

Thanks,
Amy (who is going back to weeding the bank,  I've been at it since noon)
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