Oh my! Given the DG is a male, my money would be on either of the tetras or the Cherry Barb LOL.
Appreciate that's not a lot of ruling out though. Only ever seen tetras egg laying in the soft bushy plants (planting mops usually recommended if trying to save the eggs from tetra/barbs) - are you wishing to save them?
If so, any eggs will need to removed to a rearing/fry tank or they will get eaten of course in a community set up. I used to let nature just take it's course with eggs in the trop set ups.
Please fill in your personal profile if you are posti