Accurate Plant identification can be difficult depending on the circumstances.
All of the plants shown are immature or are top prune cuttings replanted. A lot of the broad leaf plants are grown in nurseries emerged (out of the water). When put into the tank they drop their emerged leaves and grow the leaves they need to be submerged. The two leaves are often very dissimilar making the emerged plant difficult to identify.
My guess on the stem plants is a type of Bacopa, I am not certain. I do not know what the floating plant is, I could research it but then I am depriving you of the fun.
The stem plants require good light..2+ wpg ballpark. If the background plants are indeed anubius and or crypts, 2 wpg will be plenty of light.
Jay