Subdecay Liquid Sunshine does what you need. Equally capable of boosting and/or being boosted. Flexible eq options, although in an unconventional way and the tone of it is musical and natural without adding too much of its own character. It really finds ways to give you more of what you have or improve what you have. It is best with an amp that is starting to compress a little bit. Can sound a little stiff if the amp isn't cooking a little.