  Single-cell magneto-optical Faraday filters find great utility and are
realized with either 'wing' or 'line center' spectral profiles. We show that
cascading a second cell with independent axial (Faraday) or transverse (Voigt)
magnetic field leads to improved performance in terms of figure of merit (FOM)
and spectral profile. The first cell optically rotates the plane of
polarization of light creating the high transmission window; the second cell
selectively absorbs the light eliminating unwanted transmission. Using
naturally-abundant Rb vapor cells, we realize a Faraday-Faraday wing filter and
the first recorded Faraday-Voigt line center filter which show excellent
agreement with theory. The two filters have FOM values of 0.86 and 1.63
GHz$^{-1}$ respectively, the latter of which is the largest FOM atomic line
filter recorded.
