I have some samples of half body portraits here:
To get shallower to isolate:
ZD 50mm f2.0:
ZD 50mm f2.0:
30mm f1.4:
30mm f1.4:
Now, to get Deeper to include:
14-54mm~
14mm, f2.8, 1/250, ISO 200:
These are some samples of DOF of 4/3. So, deeper or...