Who are the best trackers, rangers v elfs

[Keeper of Dol Guldur]

I guess it would depend; certainly the Dunedain were masterful rangers, trained in the wild north, alongside the elves of Rivendell, and hardly ever took a break from business, so they were certainly pretty talented. Aragorn, was clearly a more talented tracker than say, Legolas. But Legolas was not an 'elvish tracker', he was an elvish prince and a warrior and archer. But certainly among the elves, there were some experienced trackers who would because of their elven gifts of keener vision and hearing, and even scent could outmatch Aragorn and if Aragorn, all the rangers, because Strider was their best. I'd guess it likely that some of the elves of Lorien could 'out-track' Aragorn. Quite possibly some of the elves of Mirkwood could also.