You mean our sun's mass is in the 75th percentile??? And all we need is for something of the same mass to come crashing into it, and we're in a black hole???
But yes, you only need twice the mass of our sun to tip the scales into oblivion. The chances of something else of similar mass colliding with Sol, though, are about the equivalent of two gnats hitting each other while flying through the grand canyon.
Space is vast, especially in the outer rim of the Milky Way where we reside, to where the chances of such a thing happening are virtually nonexistent.