I'm juggling with the same question myself. I really don't want to include the animal companion with the rangers in my campaign, especially since I've identified them as more of a guerrilla warrior type relying upon their skills and ability to work within the terrain rather than 'nature warriors with a spiffy bird.'
To date, I've had all of two rangers with animal companions and only one of those because he had failed to invest ranks in Spot, so a bird in the air was a convenience.
Personally, I've considered swiping a few of the Scout's abilities to meld together. Notably, the faster speed (which makes more sense for a ranger than a barbarian, but then again, I've got issues with the barbarian class), the potential for skirmish with greater limitations and potentially the blindsense.
Has anyone tried these in campaign? How have they worked? I've not used the scout, so I'm really unfamiliar with how balanced that tends to be.