building a tenacious warforged - mechanics help

[the OOD]

looking for assistance building a hard to kill warforged/golem, all design goals are written up below.
system is 3.5 and starting level is 3rd. this is a tall order, so I have turned to the mighty optemizers in the playground.

character design goals
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mechanical goals:
>near-unstoppable
--never tires, wearies, gives up, breaths, or stops to eat, and hard to hurt directly(a crossbow bolt would bounce off of him), and hard to put down permanently.
--high HP
--high CON
--high armor class
--living construct or undead subtype, fluffed as a machine or golem

>menacing threat in melee combat
--able to kill things swiftly at close range
--able to defeat an unprepared magic-user in close combat

>can cover and protect their "charge"
--can take hits intended for another
--can provide "cover" for their charge
>can not be swayed from their duty
--high will save or immune to mind affecting abilities
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fluff and roleplay goals:
>charged with the protection and assistance of another PC
--mechanical able to defend, protect, and aid his "charge" <--lexical gap in the English language, so I used the closest term.
--primary goal is to keep their "charge" safe in his/her adventures.
--secondary goal is to aid their "charge" in other aspects, protect their charge's companions, and ensure their continued function

>resolute and determined, but not unyielding to reason

>will often follow orders form thier "charge", but they are not compelled to do so

[Doc_Maynot]

What you are looking for is probably an AoO, Standstill, Reach Crusader (use the Doum from Dragon Compendium to save a feat), with Thicket of Blades and it slips me but there is a stance they have that makes it so enemies have a hard time attacking their allies.

You might prefer to be a necropolitan, which is a template that makes a creature an intelligent undead.
Pros: Immunity to mind affecting effects, and physical ability damage, HD are now all d12s, some other things due to being undead.
Cons: No Constitution Score

Additional: Looking at your checklist, this will fulfill most of your mechanical goals. Also, the Mage Slayer feat would help deal with casters a bit more.

[Gildedragon]

Warforged Artificer?

Or actually Warforged Crusader might be a better option:

You might want the "Good Karma" Luck Feat
Adamantine Plating is also probably a must or Unarmored Body and Mechanus Gear for armor

The Mineral Warrior (La+1) template might be good for a total +2 Strength, +6 Con, -2 Int, -4 Wis, -4 Cha

Or Arctic (la 0) for just +2 con -2 cha

[Yorrin]

Anyone with the Troll Blooded feat and either Warforged Juggernaut or Bone Knight PrC becomes immune to almost all forms of hitpoint damage (except fire and acid) as well as getting a handful of nice immunities. Toss that on your warforged, and if you go with Warforged Juggernaut you get immunity to Mind-Affecting as well, so that seems to fit your concept. It's not a flawless build, but it's pretty hard to kill and it fits what you seem to be trying to go for in terms of survivability.

Crusader, as has already been mentioned, is probably the best "protector" class. The way I'd put all this together would be:

LN Warforged
Dungeoncrasher Fighter 6/Warforged Juggernaught 5/Crusader 9

Or something along those lines.

[Ellowryn]

It will cost some feats, but a dip into Devoted Defender will net you the ability to take hits for your "charge" IF you are adjacent. Not the greatest PrC, but does help on some of points.

If you want to be both good in melee, and still "Tanky" id go: Whirling Frenzy Lion Totem Wolf Spirit Barbarian 2/ Dungeon-crasher Fighter 4/ Warforged Juggernaut 5/ Devoted Defender 1/ Crusader 8

All to pink-misting goodness of a charger, with some good damage soak and ability to lockdown or otherwise interfere with enemies ability to attack the rest of the party.