  We study a simple class of dark matter models with N_f copies of electroweak
fermionic multiplets, stabilized by O(N_F) global symmetry. Unlike conventional
minimal dark matter which usually suffers from Landau poles, in these models
the gauge coupling g_2 has a non-trivial ultraviolet fixed point, and thus is
asymptotically safe as long as N_F is large enough. These fermionic n-plet
models have only two free parameters: N_F and a common mass M_DM, which relate
to dark matter relic abundance. We find that the mass of triplet fermionic dark
matter with N_F being dozens of flavors can be several hundred GeV, which is
testable on LHC. A benefit of large N_F is that DM pair annihilation rate in
dwarf galaxies is effectively suppressed by 1/N_F, and thus they can evade the
constraint from gamma-ray continuous spectrum observation. For the case of
triplets, we find that the models in the range 3 <= N_F <= 20 are consistent
with all current experiments. However, for N_F quintuplets, even with large N_F
they are still disfavored by the gamma-ray continuous spectrum.
