Golem2176 said:
If most sages are experts and all ten of their class skils are the Knowledge skills, they aren't very effective at anything else.
I think most sages would also have maximum ranks in Profession (sage). All the other skills that wizards have also come in handy for sages. So, I don't think your argument that most sages are experts holds much precedence.
Have you met a lot of people with PhD after their name? Most of the ones I know tend to be fairly useless as a rule for anything outside their particular fields of experitise, that includes things like car maintaince, using a computer, finding their way outside the campus, balancing a check book... etc etc
Thats not to say their ALL like that

, but they do tend to keep to a field of their expertise rather than diversify past more than 3-4 other things.
That said, theres maybe some room for a 'Sage' NPC class out there but I think in a pinch a high-Int expert would do fine, a concentration for 2-3 of his class skills receiving 3 skill points, 4 class skills with a starting rank of about 2 and the other 3 being basic survival/interpersonal skills at 1 or so. Add to that he can have a skill focus feat as his 1st level feat for 1 of the primary class skills.
ie: Level 2 Human Expert with Int 18
Staring Skill points: 10x4 +4+10 = 54
* Class # X-Class
*Know: Planes 5
*Know: Arcana 5
*Know: History 5
*Know: Local 3
*Perform: Oratory 3
*Decipher Script 4
*Profession: Academic 3
*Craft: Manuscripts 3
*Diplomacy 3
*Search 4
Bonus Languages/Writing 4
# Forgery 1
# Sense Motive 2
# Ride 2
# Listen 1
# Spot 1
Feats:
Skill Focus- Know Planes
Alertness
Well thats my hack at a 'Academic' type of person anyway.