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Considering the recent experimental results on exclusive semileptonic $B$meson decays showing sizable departure from their Standard Model prediction oflepton flavor universality and keeping ongoing and proposed non-standard Higgssearches in mind, we explore the charged current flavor observables($\mathcal{R}_{D^{(*)}}$, $\mathcal{R}_{J/\psi}$), among other $b\to c\ell \nu$transitions, in the presence of a relevant scalar current effective new physicsoperator. We use $B_c$ lifetime and predicted bounds on the branching fractionof $B_c \to \tau \nu$ decay as constraints. We show the allowed parameter spacein terms of the real and imaginary parts of the corresponding Wilsoncoefficients for such interactions. Under the light of obtained results, westudy the prospect of two benchmark models, rendering the Wilson coefficientsreal (Georgi-Machacek (GM)) and complex (Leptoquark (LQ)) respectively. We showthat constraints from $b\to c\ell \nu$ on GM parameters are consistent withother flavor constraints on the model, if we drop the \Babar~results. Includingthose disfavors the model by more than $3\sigma$. On the other hand, onebenchmark LQ scenario, which gives rise to a single scalar current effectiveinteraction, is still allowed within $68\%$ confidence level, albeit with ashrunk parameter space.

$b \to c \ell \nu$ anomalies in light of extended scalar sectors