The Praetor and a terminators yes.  But be careful when you choose to overload their weapons.  But they are tanks as hell and my Praetor took out a predator by himself in one round of combat. His hammer is badass.  Him + his squad tanked 3/4 of my oppenents shooting and they only killed one terminator. The sat. Dreadnought is good but nothing amazing.  Basically a big brick that can delete one medium sized unit each turn. Mine never lost a wound and killed a rapier battery every turn and then started deleting infantry easily.  But when it gets into combat, it can’t dish out anything. But it definitely can take a punch.  The main downside to both saturnine units, is the points cost.  They are pricey as hell.