  We present a novel class of oscillatory integrators for the
Klein-Gordon-Zakharov system which are uniformly accurate with respect to the
plasma frequency $c$. Convergence holds from the slowly-varying low-plasma up
to the highly oscillatory high-plasma frequency regimes without any step size
restriction and, especially, uniformly in $c$. The introduced schemes are
moreover asymptotic consistent and approximates the solutions of the
corresponding Zakharov limit system in the high-plasma frequency limit ($c \to
\infty$). We in particular present the construction of the first- and
second-order uniformly accurate oscillatory integrators and establish rigorous,
uniform error estimates. Numerical experiments underline our theoretical
convergence results.
