  The symmetry of the superconducting condensate in Sr$_2$RuO$_4$ remains
controversial after nuclear magnetic resonance (NMR) experiments recently
overturned the dominant chiral $p$-wave paradigm. Several theoretical proposals
have been put forward to account for existing experiments, including a
$d+ig$-wave admixture, conjectured to be stabilized by longer-range Coulomb
interactions. We perform a material-specific microscopic theoretical study of
pairing by spin- and charge-fluctuations in Sr$_2$RuO$_4$, including the
effects of spin-orbit coupling, and both local and longer-range Coulomb
repulsion. The latter has important consequences for Sr$_2$RuO$_4$ due to the
near-degeneracy of symmetry-distinct pairing states in this material. We find
that both the $g$- and $d_{x^2-y^2}$-wave channels remain noncompetitive
compared to leading nodal $s'$, $d_{xy}$, and helical ($p$) solutions. This
suggests nodal time-reversal symmetry broken $s'+id_{xy}$ or $s'+ip$ phases,
promoted by longer-range Coulomb repulsion, as the most favorable candidates
for Sr$_2$RuO$_4$. We analyse the properties of these states, and show that the
$s'+id_{xy}$ solution agrees with the bulk of available experimental data,
including recent discoveries from NMR, muon spin relaxation ($\mu$SR), and
ultrasound measurements.
