Here is my crusader tank.
pale elf (goldpact/unbroken) with 10 might, max con, 3 dex, max resolve and spread remaining points in int and perception.
weapons: any dagger with weapon model and large shield Akola's Apex Ward with hunter vigor or BoW soul bound shield or Cadhu Scalth or Shining Bulwark(my favorite because you can get it early and extra armor really reduces your stress level and pause frequency)
armor: Patinated Plate (same reason as shining bulwark and even the location is close, less loading time for me was really sweet). Also, try to throw your crusader in to start the fight and have your remaining part stealth, so you can stealthily full buff your entire party before rushing in and not worry about your tank dying.
the only essential talent you need to take is defender stand and pally's armor aura, throw the rest of the talent into anything defensive.
Thats all. I start every fight by throwing in my crusader to anchor all melee enemies, fully buff my entire party with priest buffs, then summon a couple minions to distract enemies AI before full party rush in to mow everything down while my crusader is being focus.
Only down side is my crusader doesnt do much damage. But since he already locks down all enemies with his engagement, armor and HP, my other dps can go on full offensive stats.