I'd go for that.3rd one resembles Syngonanthus Belem a lot.
The first two photos are the same plant, front and top photo. Glad you replied Gordon. The first plants are from the RAOK that I won in May from you. I checked the thread for the contest to see the plant list. Most of what is listed aren't the plants in question. The kicker is, there is a line that states "And whatever other plants in feel like putting in the box". So, these were mystery plants from day one. I'm only trying to identify them to help get the ferts and lighting right as they grew well for a couple weeks and have stopped growing all together now. I PPS Pro and DIY CO2 with lower light. Also have done osmocote caps as well.2nd looks like a standard young amazon sword. The biggest issue is the amount of variants and hybrids in the trade. You'll have to wait till it becomes an adult, from the size its about 3 months old?
3rd looks like a bacopa or emmersed growth rotala rotundifolia.
4th looks like Syg. Belem to me as well. I'd up your lighting and ferts, it looks unhappy.