Looking at that list only octopus, Scottish Power and British gas seem to have competitively low EV night rates. The others look quite poor in comparison.
We are with OctopusGo we pay £92.77 just had a £250 rebate came into handy for Christmas presses and another rebate in August of £150 and we are still £129.86 in credit and we are charging a PHEV for the majority of our journeys.
We changed to Octopus January 2019, originally we were with Southern Electric despite being on a 3 year fixed rate our energy price were going up to the point we were paying £110 a month, after reading Which we decided to change, not sure what Southern Electric charge now, but we are 100% happy with Octopus we have even seen the price go down.
To date we are nearly £20 better off per month, received £400 this year in rebates plus we are charging up our PHEV
Unfortunately I have suffered a brain injury and occasionally I get confused and often say the wrong thing.