Lowpass and transient plugin in one ?

[Coachz]

I'm finding that when I trying to adjust the sound of a Shaker that I'm often removing attack and also high frequencies. Is there a plug-in that I can drag around in two dimensions to adjust varying amounts of both?

So if I dragged vertically I'm adjusting the low-pass and if I dragged horizontally I'm adjusting the transient attack. That way I could just drag the mouse around in a circle and find out where the sweet spot is for both parameters. Anyone else have some ideas on an easy way to accomplish this? Thanks in advance