When I was doing my list, which eventually turned out to be an attempt to an top 150 most influential metal bands of all time, someone pointed out that I had left out the crossover thrash bands. I did that because I hadn't so much knowledge of crossover thrash. I'm very initiated in the history of most of the more traditional metal genres, but thrash has always been my least favourite of them (heavy, power, prog, doom, thrash, death and black). Personally I prefer music that is darker, or sometimes more melodic when the melodies are too good to resist, but pure thrash is for me too much only about aggression, I mostly like thrash on the border to death metal like early Pestilence, Deceased and German Poison, and also Metallica who has melodies that are too good to resist. When it comes to hardcore, that is even more about pure aggression, so I never thought the mix between hardcore and thrash would be anything for me, so I had never really checked out those bands. When I checked out them I found a pair albums I liked like Carnivore's Retaliation and Suicidal Tendencies's Lights... Camera... Revolution! (there are always some albums you like even in the genres that are not yours).
But now this thread is about the most influential crossover thrash band. Since I didn't have enough knowledge of the genre, and didn't find any good history page about the genre (the wikipedia page wasn't much of help) I didn't know how high I would place the different crossover thrash bands in my list, so I asked in my most influential metal bands of all time list for a useful link or somebody's thoughts, but didn't receive any answer, so I instead start this thread.
As I already have pointed out I have not enough knowledges to give a personal opinion about the question, so now I ask for yours.