After re-reading Mistborn, I have to say that Leras was the best, by FAR!!(And Ati second) As someone said in the first couple of pages, the lying, cheating, oathbreaking force of good was awesome! Ati is also epic because he is the only Shardbearer(or is it Shardholder?) that we have met that has been completely taken over by his Shard's Intent, but still shows human emotions, like the need to brag to Vin. Overall, Leras is awesome and I hope we see him in one of the earlier Cosmere books.