Anders.. i support his char no matter what
that doesn't mean i don't like Fenris he is pretty badass and totally bro, but i don't know what ppl see in him as LI
Fenris at least recognizes that there can be smart mages (he comments that Bethany was a smart mage and he respects her), and will go along with your pro-mage plans with them if you've convinced him enough. Anders is a hypocrite, and a stubborn mule to the very end, seeing that every act of violence Mages do is justified.
His character is foolhardy and cannot be influenced or convinced otherwise in any way by Hawke. For that reason, Fenris is the better character.