your recommendations for brilliant summer foliage?

I'm looking for brilliantly-colored foliage in colors other than green during summer.
These plants must be able to survive a Wisconsin summer. Temperature extremes can be expected to range from 40 F to 90's F; ( 5 C to 35 C ), so I'll assume that many bromeliads and tropicals won't survive outdoors here.
So far I have discovered coleus, bloodleaf, and persian shield.
What else do you recommend?
Thank you very much for all suggestions.
Ted Shoemaker
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