There aren't any.

A 25-30 $M_{\odot}$ main sequence star would have a spectral type of $\sim$ O7 and an absolute $V$ magnitude $M_V \simeq -5$ (see Zombeck 1982). A giant star with this mass would be even more luminous.

At a distance of 30pc, the apparent magnitude of such a star would be $V=-2.6$. Closer examples would of course be brighter. Sirius is the brightest star in the sky with $V=-1.46$.

The nearest O-star may be zeta Ophiuchus which is at about 450 light years (or about 140 parsecs).

There aren't any.

A 25-30 $M_{\odot}$ main sequence star would have a spectral type of $\sim$ O7 and an absolute $V$ magnitude $M_V \simeq -5$ (see Zombeck 1982). A giant star with this mass would be even more luminous.

At a distance of 30pc, the apparent magnitude of such a star would be $V=-2.6$. Closer examples would of course be brighter. Sirius is the brightest star in the sky with $V=-1.46$.

The nearest O-star may be zeta Ophiuchus which is at about 450 light years (or about 140 parsecs). This might be a bit lower than $25M_{\odot}$. Betelgeuse, a red supergiant at a Hipparcos-measured distance of $152\pm 20$ pc, probably has a mass of about $15 M_{\odot}$, but I think this is quite uncertain.

The secondary of $\gamma^{2}$ Velorum has an O7.5V spectral type and reasonably well-determined mass of about $30M_{\odot}$ (Eldridge 2009) and a distance of $336 \pm 8$ pc (North et al. 2007).