This may sound rude, but it isn"t meant to be.
A bit like "the best camera in the world is the one that you have with you when you need it", the best boots are the ones that fit.
Try loads on, if you can.
Scarpa make great boots. I loved my SLs, but my feet got too fat for them. I'm now on Meindl 'comfort fits', Bernina and Antaleo.
Alt-Berg have five width options for some of their boots, although limited number of stockists.
Apologies if that hasn't been helpful, but happy walking!