Bulk Powders Vegan protein is the best tasting vegan option I’ve found. They have a pretty large range of flavours and you can normally get a decent price if you shop around a little bit (I tended to alternate between going direct and Amazon to find the best deal).
That said if you’re already having Huel I agree with the above - it’s probably going to be easier (and cheaper) to use Black Edition Huel than it is using a supplement.
Another vote for Huel black but I have some Form
nutrition protein powder that I sometimes add a scoop of if I just need a quick protein hit. It’s vegan and I think it’s delicious. It’s very sweet though so if that’s not to your taste then I would avoid.
It’s also not the cheapest out there!