  To obtain high-quality results from lattice QCD, it is important to use
operators that produce good signals for the quantities of interest. Free-form
smearing is a powerful tool that helps to accomplish that goal. The present
work introduces a new implementation of free-form smearing that maintains its
usefulness and reduces its computational time dramatically. Applications to the
mass spectrum of $B$, $B_s$, $B_c$ and bottomonium mesons show the
effectiveness of the method. Results are compared with other lattice QCD
studies and with experimental data where available. The present work includes
the first lattice QCD exploration for some of these mesons.
