Chronologist
First Post
Mystic Ranger and Wilderness Rogue give you the skill requirements and match the concept. They don't have much in the way of healing (aside from some from the ranger IIRC).
Archivist is another solid class choice, but you seem to dislike frail characters.
Though the class is rife with problems, the Truenamer is an excellent buffer/healer with some other interesting options, with the skills you want and it fits the idea of a wise old man who has seen the world and knows many things. You'll probably have to talk to your DM about using a fix online for the class (or just maximizing your Truespeech skill as early as possible), but the class has some of the most rewarding flavor in all of 3.5.
Archivist is another solid class choice, but you seem to dislike frail characters.
Though the class is rife with problems, the Truenamer is an excellent buffer/healer with some other interesting options, with the skills you want and it fits the idea of a wise old man who has seen the world and knows many things. You'll probably have to talk to your DM about using a fix online for the class (or just maximizing your Truespeech skill as early as possible), but the class has some of the most rewarding flavor in all of 3.5.