Dalinar and Navani: the most powerful couple ever to live on Roshar?

Vin(Diesel)
By Vin(Diesel) in Stormlight Archive,
Now that Navani and Dalinar are bonded to the Sibling and the Stormfather respectively, are they the most powerful couple ever to live on Roshar? Unless two of the Heralds were married to each other or two previous bondsmiths, I think they probably are.  Also, I find it fitting that two bondsmiths are bonded to each other. 
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