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First, you need to be aware that there is a 3 way technology triangle between rolling resistance, traction (especially wet traction), and treadwear. To get good results in one area, the other areas have to be sacrificed.
Also be aware that tires labeled LRR mean low RR compared to tires with similar wear and traction characteristics. LRR is NOT an absolute.
That means the tires with the best rolling resistance are going to be OE tires - because vehicle manufacturers are very concerned about fuel economy and are willing to sacrifice treadwear to get it.
So how do you identify OE tires? Sometimes, it's a single size in a particular line of tires. An example would be the Bridgestone Ecopia EP20. It only comes in a P195/65R15. Tire Rack confirms that this tire is OE on Hondas.
Unfortunately it is UTQG rated as 380BB.
The BS EP422 you mentioned is OE on newer Priuses, and it is rated 600AA - BUT - that probably means it has a higher RR than the EP20.
The other tires you mentioned are probably NOT OE and will probably not have as good RR as either the EP422 or the EP20.
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