Cyclone, I'm glad we can both agree on a few things, such as how bad that wiki is. (I won't even name it lest it come up in searches).
Multiple classes might be an issue if the DM is one of those types that think multiple classes means munchkin or something similar. The DM might instead enforce XP penalties for multiclassing.
The WoW-style tank can kind of work using various things, but it can be difficult to do if your DM isn't humoring you on a tank build. If a monster finds its attacks aren't really hitting a target that isn't doing much damage to it (usually called a turtle), but another target that's squishy is hitting it for a lot, chances are the monster is going to attack the squishy character because attacking the well-armored character not being much of a threat could get it killed by the squishy, and it's usually in the monster's best interests to live.
Mindless Rage is the closest thing to a reliable taunt I know of, and it's not even all that reliable actually because it only works against certain creatures, it has both a save and SR, and those creature types it would normally work on can get immunity to it through various means.
If you can't reliably taunt a creature to attack you that tends to limit your typical "tank" abilities. You either have to make yourself a big threat and/or make others less appealing to attack. Crusaders can definitely make themselves both through maneuvers and such like
Shield Block or
Iron Guard's Glare. There is also a fighter variant from Dragon Magazine issue 310 called Bodyguard that can grant an adjacent ally its shield bonus to AC (that stacks with the character's own shield bonuses!), or his Combat Expertise bonus to AC, or both.
Another form of tanking is called Battlefield Control. Basically you make it difficult or impossible for an enemy to harm you or your group. Martial types usually go for a Lockdown build that prevents opponents from moving and taking actions. This is often achieved through things like
Thicket of Blades,
Combat Reflexes, and
Stand Still, plus a reach weapon. Tripping using
Improved Trip and
Knock-down can also limit enemies.
Cyclone, I don't see anything in DotU that directly nullifies charging. Could you perhaps give the name of the item? Though there is the Ring of Anticipation on page 100 for 6,000g that allows the user to always roll twice on initiative, which could just put an end to the encounter. Perhaps you were thinking of Steadfast Boots on page 138 of the MiC? That doesn't really shut down charges unless the damage is enough to kill the enemy, but for 1,400g it's a steal.
I imagine a construct could use welds and such to mimic scarring for Runescarred Berserker. Focused heat like from a blow torch could also work. @
Imaginari , the Runescarred Berserker can be found in Unapproachable East if you're interested in looking at it.
If you're worried about not being in control of a Frenzied Berserker, you might not want to play one. Yes, the damage can be phenomenal, but chances are you'll be able to do enough damage and such without it.
If you really want something insane though, you might look at
Martial GOD (or how to be BSF and GOD at the same time). Basically the non-cheesy parts of that build use the Bloodstorm Blade PrC from ToB along with
Knock-down and
Knockback to throw melee weapons around while tripping and bull rushing opponents to move them around and keep them down. The primary cheesy part is
Boomerang Daze with a generous interpretation of the Aptitude weapon enhancement in ToB (page 148) that allows one weapon to count as another for purposes of feats. Even if the Dazing stuff isn't allowed, throwing weapons around to trip and bull rush opponents is quite useful.