I was really into making "bodyguard" builds for a while, that had some melee battlefield control, but also the ability to do things like step in front of attacks aimed at an ally, soak up damage that should have went to your allies, etc. A crusader/ardent multiclass is probably the best way to go for that (Guardian Mantle, White Raven Tactics, Thicket of Blades, Reach Weapon, Share Pain, etc). I can provide build suggestions, if you're interested.