Gestalt or Existential - Which do you prefer?

The contributions of Rollo May, Victor Frankl, and Irvin Yalom cannot be denied as they each contributed to existential understandings in different ways. Fritz Perls belief that the "whole" of an individual is greater than the sum of their parts added to psychology the importance of considering unfinished business and the barrier this creates to becoming "whole." Of these two theories, which do you believe you gravitate to and why?