Check out the Mercenary Ranger from AEG's Mercenaries book. One of the best alt.Rangers out there, IMO, because it emphasizes options rather than restrictions.
Want a Ranger that rocks with a bow and is a master tracker & woodsman? No problem.
A Ranger that has spellcasting capability that hunts down monsters within his domain? Can do.
A two-weapon fighting melee machine complete with animal companion, extra HP's, and improved natural armor? Certainly.
The beauty of this class is that it allows you to mix and match the options you want to build the Ranger to fit your concept.