Dwarf gouramis come with health issues. Those dwarfs bred in the far east usually have one, if not two, incurable diseases by the time they reach the shop.
Honey gouramis are a better option.
If you have hard water, none of the fish you have mentioned will be suitable, bit they all are if you have soft water.
Your location is given as Wales - is your water company Welsh Water/Dwr Cymru? If it is, it's one of three companies that don't give a number for hardness, but they do give hardness in word. These words make the water sound harder than we, as fish keepers, would call it. Tell us the words, and that will give us a band of hardness to work with.
Help and advice on the quality of your drink water and any problems that could arise.
www.dwrcymru.com
Enter your postcode, then click/tap on water quality and it will give your hardness in words.
It would also be helpful to give the dimensions of your tank. UK tanks tend to be narrower and taller than American tanks of the same volume so less swimming room, which can affect the choice of fish.