So after 30 minutes of testing..
Ragna: 5B>6B>3D>jC
If they block high, they get hit by 3D and jC, which still allows you to combo
If they block low, jC will whiff, but you will cross over the opponent (possibly)
Note that the jC does not count towards the combo from 5B>6B>jC
Jin: 5B>6B>jB>xx
Noel: 5B>6B>jA
Rachel: None
Taokaka: 5B>6B>jA
Carl: None
Litchi: 5B>6B>jA
5B>6B>jC works too, see Ragna
Arakune: 5B>6B>jA
Tager: 5B>6B>jA
5B>6B>jB>xx
5B>6B>j2C>xx
5B>6B>jC (see Ragna)
Bang: None
Hakumen: 5B>6B>jB>xx
5B>6B>jC (see Ragna)
Lambda: 5B>6B>jC
I tried 3D>jC>xx, and it pushed me behind Ada, so I'm not sure if you'll want to try this (unless you want to RC it)
Hazama: 5B>6B>jB
5B>6B>slightly delayed jA
Tsubaki: None