Well, I have a number of powerful, excentric wizards, but few of them could really serve as Gandalfes (Gandalves? Like staves, elves, dwarves, and wolves?). In fact, the only two of them that could reasonnably fill Gandalf's niche are Caleor the Ancient, an archlich (LG), and Hollow-Wind, a ghost (N).
So, what if I look outside of old and powerful wizards? Then I could look at old and powerful psions. Meet Ottomsoh the Venerable, a Blue (you know, the psionic goblins) seer (N), leader of the homebrew's largest mercenary spy network.
All of them are wise, learned, rather benevolent, and cryptic. But they still ain't Gandalf-like. Plus, the PCs have yet to meet any one of them (though they should go heading to Ottomsoh's offices as soon as they solve their current "sidequest"). And they have more important things to do than going out of their way to help the PCs. Caleor and Hollow-Wind are working, along the other arcanists of the Prime Order, to thwart arcane menaces the world at large have no knowledge off (like Far Realmish stuff and other extraplanar menaces). Ottomsoh has a business to run.
So, benevolent, wise sages that have helped the PCs? They are not very powerful, but here they are:
- Alraone (al rah awn) is a CG half-brass dragon dragonne with 6 or 7 (don't remember precisely) Sorcerer levels. She's benevolent alright. She's taken control of a tribe of kobolds and is teaching them the CG way, as well as making them into elite soldiers to protect the northern frontier from orcish marauding.
- Saïlaswanamari (sah ee la swan amah ree) is an exalted NG gynosphinx druid 8. (She started as half-celestial to show her glorified status, but now that I have the BoED, I should maybe rework her stats with the Saint template instead.) She's willing to help the PCs on their main quest, but she's tied to her grove and can't leave her forest, so...
- Milderol, the least powerful of the "helpers," is a level 2 NG gnome sage*. He's tagging along the PCs for now, because he has his own quest who's leading him to the same place as the PCs, and they're a convenient escort.
* My specialist wizards do not get one bonus spell slots per spell level. Instead, they get special abilities related to their specialty. This allowed me to make specialist wizards that are not specialized in a school of magic, but in an aspect of wizardry, like Alchemists or Sages or Artificers. This was before UA and Eberron, by the way. Sages are specialist wizards who gain Lore (as Loremaster lore or bardic knowledge) and have Appraise, Sense Motive, and Speak Language as extra class skills.