Both lists are definitely viable, though there are a few notes I might make.
Firstly, the pFeora list might lack a little bit of punch, as you only have the Vanquisher and pFeora herself capable of doing serious damage to a heavy. Ignite on the
TFG will do in a pinch, but it's just something to be aware of, and some really high
ARM pieces could be a problem for you.
The only other thing with that list is the Paladin. He does bring a bit more hitting power, but I'm never fond of paladins without Vilmon - he just makes them so much better. It might just be worth using those two points to make the Repenter into a Crusader? Possibly, though the crusader is a little slow. Perhaps try out the list a bit, then decide if it needs the extra hitting power or not
As for your Kreoss list, I generally skew more towards ranged, but he and his feat are quite flexible, so I think it'll work out for you. You could concievably drop the Choir in this case, as the Vanquisher's shots don't need the bonus to be effective, and you have the Bastions providing extra hitting power. I don't know what you'd spend the extra points on though