  Assuming the same form of all mass matrices as motivated by quark-lepton
symmetry, we discuss conditions under which bi-large mixing in the lepton
sector can be obtained with a minimal amount of fine tuning requirements for
possible models. We assume hierarchical mass matrices, dominated by the 3-3
element, with off-diagonal elements much smaller than the larger neighboring
diagonal element. Characteristic features of this scenario are strong hierarchy
in masses of right-handed neutrinos, and comparable contributions of both
lighter right-handed neutrinos to the resulting left-handed neutrino Majorana
mass matrix. Due to obvious quark lepton symmetry, this approach can be
embedded into grand unified theories. The mass of the lightest neutrino does
not depend on details of a model in the leading order. The right-handed
neutrino scale can be identified with the GUT scale in which case the mass of
the lightest neutrino is given as (m_{top}^2/M_{GUT}) |U_{\tau 1}|^2.
