Ongh as a five star, definitely.
For your three star, there are a lot of options, but in this case I would go with Nyema , because it can create a very big life gap; something your two stars can't really do since they only have 1 damage. It all depends on your other half deck though.
5* --> Ongh
3* (dependent on other half deck)
--> Radek if the other half is heavy on attack manipulation, vice versa for Rodney.
If the other half isn't predominantly one or the other, it's purely a preference decision. I probably choose Rodney more often.