Using as many classes as possible

[fuinjutsu]

If you don't like what sentinel of Bharrai gives you and your requirement is only that the prestige class has class features the first two levels, holt warden, earth dreamer, keeper of the cerulean sign, loremaster, ruathar, or thaumaturgist could be used instead.  Those classes don't tend to have great features (though augment summoning isn't bad), but they do have easier feat prerequisites. 

Holt warden is incompatible with Church inquisitor.  Alignment.

Don't have access to LoM or RoS, and thus couldn't check prereqs for some of those, and forgot about the rest (it was about 1 in the morning and I was paging through CD)

Thanks for the suggestions.

[awaken DM golem]

Psionics?
Let's see ...

Small pile of base classes 1
Ardent 2
Bloodline 2 or 3 (and the more fun definition)
Early entry Arcane Caster 1 (hopefully)
Early entry Divine Caster 1 (hopefully)
as many +1 festing PrC's as possible
maybe slide in Monk 1 and Tash feat
finish with Slayer to lose just 1 ML.

(don't have time for build ... real life sucks)

very rough guesstimate:
Elemental Envoy with near epic Charisma
heavy use of PsyRef
access to all the versatile spells yanked over to Ardent trickery
slow access to Psi 9s
most gold dumped into custom items of versatile spells
recharge (!)

kind of a toolkit caster, iffy face, buffer, healer

[Maat_Mons]

Holt warden is incompatible with Church inquisitor.  Alignment.

Church inquisitor requires lawful good or lawful neutral and holt warden requires any neutral, so lawful neutral should be fine. 

Don't have access to LoM or RoS, and thus couldn't check prereqs for some of those

Earth dreamer requires knowledge (nature) 5 ranks, spellcraft 10 ranks, earth sense, and the ability to cast 1st level spells.  Earth sense is a feat that requires con 13, wis 13, and not having the air or aquatic subtypes.  It's not very useful by itself, giving the ability to detect, but not pinpoint, creatures touching the ground as a move action. 

Keeper of the Cerulean Sign requires not having the aberration type, gather information 5 ranks, knowledge (arcana) 8 ranks, knowledge (dungeoneering) 8 ranks, sense motive 5 ranks, aberration banemagic, and craft wondrous item.  You also have to craft a cerulean sign, which costs you 2,000 gp and 160 xp.  Aberration bane magic is a feat with no prerequisites that makes you spells automatically deal +2d6 damage to aberrations, so not overly useful. 

[fuinjutsu]

Holt warden is incompatible with Church inquisitor.  Alignment.

Church inquisitor requires lawful good or lawful neutral and holt warden requires any neutral, so lawful neutral should be fine. 

Which would then cut out Sacred Excorcist, which requires good.  Sorry I phrased that badly.  You can only pick two out of Sacred Exorcist, Church Inquisitor, and Holt Warden.  I picked the former two.