US-05, WLP001, wyeast1056, chico, whatever else is an American ale strain can produce some bad flavors at that temp. Try a swamp cooler as Jlem mentioned.
Actually US-05 has a recommended temp range of 59-75 degrees. It does really well fermenting in the 70-75 degree range without producing any funky esters. You can expect the same from WLP001.
S-33 is another that does well in the 70 degree range. Is a good one for wit's and Belgian style brews.
I am not a huge fan of it but the coopers ale yeast loves 70 degrees too.
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