pond stocking

i'm planning to add some new fish for my koi pond. are the following fish suitable for a koi pond? all of my koi are big - bala shark - clown knifefish - black ghost knifefish - ID shark - Flagtail fish - Giant gourami - Oscar - Rainbow shark - Freshwater stingray

Will a silver arowana, school of tinfoil barbs and a Lima shovelnose catfish work together? (or any other suggestions lmk)