Yet another vote for Harris, but I do like my GFT Rose almost as much as my Harris soaps. Too bad getting a good Trumper soap seems to be a crapshoot or I'd probably buy more. I don't really have a interest in trying T&H as I have two more Harris soaps I haven't tried yet.
I love both the GFT and T&H creams and they whoop the DRH cream's butt - however when it comes to shaving soap, DR Harris line is king. The entire DRH line is outstanding in both scent and performance.
I have all three and think that they are all very good. I must have been lucky with the GFT soaps that I have because I don't have any issues with them. I think there is only one T&H soap and it is a great performer with a wonderful light lavender scent. While I have more GFT soaps and think their scents are outstanding, strictly from a performance evaluation I would have to say D.R. Harris by a small margin.
Another vote for D.R. Harris. I've tried all three, but always got a better, more consistent lather and shave with Harris. And Arlington smells fabulous.