Build 17 All Base Core Class Caster Lists
Steal [DoF141] wrymling small 4RHD, +2con&cha, +3nat, 60'? line 1d6 acid BW DC13, alternate form, acid immune, +10save poison, 16SR, sorc CL1, 60', 150'(avg)fly, 30'swim
Go 3str, 3dex, 20con, 14int, 14wis, 20cha (or 18wis, 12cha if using SAD caster nerf)
DoEp15 Half-Dragon Form means 18str, 10dex, 12con plus medium humanoid physical stats, form+4 nat, 2d4claws, 1d6bite, breath weapon as per size max 12 dice.
DoEp30 Child of Eberron: druid, survival, arcane druid casting but no cleric casting
DoEp31 Loredrake: +2sorc levels, d10 RHDs
Have a Major bloodline and thanks to the "ruling" on Souther Magician, the fact that a spell is divine or arcane does not change when a caster casts the spell as one or the other. Therefore our dragon casting druid or cleric spells is still 'casting divine spells' even though he casts them as arcane. Most people will find the RAW a bit silly, so feel free to throw on Southern Magician if you don't take that interpretation. Feel free to add Arcane Preparation or Battle Blessing or .
Be NG and Buyoff the 2 LA (faster if using fixed 3.5e's mundane buffs)
4HD / Sorc 1 / Prestige Bard 2 / Prestige Ranger 1 / Rainbow Servant 1-4 [CD54] / Sacred Exorcist 1 [CD57] / Silver Pyromancer 1 [FN150] / Rainbow Servant 5-10
Grants 9th level spells (non fixed 3.5, obvious) if you take the a Savage Species ritual to gain the (kobold) subtype so you can have a certain greater ritual (or just level-draining a RHD).
Or you can just settle for a 3.5-fixed 7th level spells:
4HD / Sorc 1 / PrC Bard 2 / Prestige Ranger 1 / PrC Paladin 1 / Rainbow Servant 3 / Sacred Exorcist 1 / Rainbow Servant 4-10
Now just by level squared in gp to buy knowstones [DragMag333p36] for almost any spell you want to cast. Blow as much of your WBL as you want. You're basically a recaster that can BUY spells known. If being a VoP chameleon with higher level spells but fewer slots bothers you, you could bust of some cheese: item + aberrant wildshape + Assume Supernatural Ability = Beholder Mage 1 instead of Sorc 1. Now you know all teh spellz rather than 40+WBL. You're still limited on slots though 50+stats (w/ spellcasting prodigy)+item familiar+rings of wizardry if going Beholder Mage isn't as many as you'd think. Even if you manage 102 slots, you're still looking at a 3% "yes" rate compared to the size of your spell list (or x3 that if using the 3.5-fixed source-split spell lists). Obviously I'm exluding TO like recharge magic or an illithid savant munching on a mind mage with a pp recharge setup.
Since you can free access to the sorc(22+2160 spells), cleric (1228 spells, 673 non-wizard), druid (876, spells, 534 non-wizard and 171 of those are cleric spells), bard (553ish spells, 120 of which aren't in the previous lists), ranger (248 spells, 32 of which aren't in the previous lists) and paladin (175 spells, 48 of which aren't in the previous lists not including the 2 paladin+ranger only ones), this accounts for 3,400 spells (or about 85.9% of all spells). I'm using my already posted Sorted 3.5 Spells here. Fun fact: 876 druid spells, 248 are not covered in any of the other main lists. To give you an idea, the Healer list is 56 spells long and the Assassin list is 125.
The largest remaining list is the Sanctified list at 36 spells. So from this character's point of view, the sanctified unique list is longer than the ranger one. You did take Arcane Preparation, right? I really wish Excel could handle more rows. Nevermind it was a relic of the 2007 compatibility I was using. So if we don't count the Articer list (which is the only non-arcane, non-divine list I know of) at 46 spells, the next largest unique list is the OA shaman at 29, the Corrupt list at 25, and the assassin list at 16. Also keep in mind that the numbers are only trustable to about a dozen. Don't blame me, I'm just the compiler. For instance my spreadsheet lists 13 ur-priest only spells, which I doubted so I looked up Lifeward and sure enough, it wasn't properly listed under cleric.