Drum software and quantinization

I am a guitar player, not a drummer. I don't own a drum set. However, the music I like to create usually needs custom drum tracks for accents and alternative rhythms.
There are tons of software drum machines around, however most are programmable using the beat grid. When I see that grid, all inspiration for recording is gone. Forget it. It always ends up sounding fake anyway.

What I'd like to do is to use my midi keyboard and tap out the drum patterns into a piece of software which will quantize the beats. Do you know of any software that will do this?

Thank you.