While large they arent really that Predatory, feeding on mostly insects(Aquatic and Terrestrial).
I have kept them with fish small enough for them to eat and they dont even try, And the only agression I have ever observed is towards eachother.
I doubt they would want the corys even if they were Piscivores, I had a Large Crencichla Vitatta that ate everything in its tank including a 6" Shovelnose(At the time was the same size as the C. Vitatta) and never tried to down the corys.
I will however keep a close eye just incase, I have other placement for them if any problems happen to arise.
Coryman:
http://www.fishbase.org/Summary/Species ... temporalis
I hope to order them this Wednesday.
Thanks for the Replies,
Sam