I hate sucralose or stevia based Huel. It is much too sweet for me. I bought unflavoured unsweetened (UU) Huel with a relatively small amount of Huel chocolate flavour added as UU on its own is too bland. But that is not a perfect option as the chocolate flavouring contains stevia.
As a better alternative, the idea I read of mixing UU Huel with plant milk was a revelation to me. However the nut-based plant milks worked far better for me. They gave me a pleasant earthyness while the likes of oat, soya and pea milk did not work well for me with an odd sort of creaminess. I tried almond, cashew, macademia and hazelnut milks - they all work well but hazelnut stands out as working brilliantly for me - I cant get enough of it. I have read of walnut and peanut milks which I would also probably like but I have not seen them available commercially. I did try tiger nut milk but it did not work for me. I found coconut milk a nice drink on its own but it did not work well with Huel.