GFT and TOBS both do it. I've found that all 3 of them produce an excellent lather... I do notice that TOBS is significantly cheaper than T&H and that GFT gives you a bit more for your money. I think however that since it takes so long to go through a pot of cream if you have a preference for a particular brand buy it, otherwise get the cheapest.
I've just bought a tub of Vulfix limes to replace the T&H limes I've just finished, if I'm happy with it then I'll stick with Vulfix to save money, otherwise I'll try another brand and if all else fails be back with T&H.