I've seen unhappy reports from just about every clinic on this forum, so I don't know why people are so hung-up on GNG. I've seen good results for them too. The complaints on this site seem to be for the same doctor (dr seong) so if you take a consult, keep that in mind and see what Doctors are available. I'm not sure I remember the doctor that was putting out good results. Dr Hong maybe? I'm not sure. One was doing good noses w/ no complaints.
BUT, GNG is probably not the right clinic anyway for a dramatic slim nose. GNG noses are usually more natural looking. Hopefully someone else can point you in the direction of clinics who are more adept at dramatic looks because there are probably better choices for that.
I don't know anything about the other two clinics, sorry.