FFG's "Wilderness" supplement (a severlyunderrated book) features several additional styles, some of them combat oriented, some exploration-themed, some more druidic
among them : Spear Fighter, Ranger Knight (board and shield), Outrider, Loremaster, Explorer, 2-handed Master and Slayer
Most have rather unique (not duplicaple through feats ) abilities. They see pretty heavy use IMCs, as most 2 weapon builds rely heavily on fighter levels, as do archers.
The book also features additional fighting style abilities for rangers foregoing spell-use, with three more manouevres per style for higher levels.