Tech21’s new XB Driver will likely be the king here, but it’s not cheap. It’s like a more flexible DP3-X (which uses a similar approach but with a fixed crossover frequency).
Tech21’s YYZ range do something in this vein also. The dry signal is EQ’d to boost the bass and roll off the highs, and the ‘tight’ button rolls off the lows hitting the drive circuit. And the EQ knobs just affect the drive channel.
Orange Bass Butler is also worth a look, like the YYZ it doesn’t actually have a crossover, but you have 2 channels in parallel with their own EQ, so you can roll the bass off one and the mids/treble off of the other.