Yeah...the only way to mitigate the monitoring problem is with a monitoring setup, actually. Headphones are very bad for critical listening and mixing because the proximity effects caused by having the drivers so close to the ear give false impressions of timbral content, overall bandwidth weighting, and the like. Basically, they cause "lumps" in what should be a relatively flat listening curve, and this makes using EQ very deceptive. Worse still, once you've created the "lumps" for yourself, then listeners who ALSO use headphones, buds, etc will ALSO have to deal with the "lumps" their own systems cause, which is the other problem with mixing in headphones. What sounds right in the closed environment of the cans tends to sound awful on speakers in free space without some major (and often expensive) correction measures, and can sound even more wacky in headphones that are "hyped" differently from your own.
My suggestion here isn't more plug-ins, in the end. You need to spend some money and get a decent monitoring setup. All the VSTs in the world won't help you if you don't have an accurate sense of what they're doing. Even the prime picks I made above will be just as pointless without any way to know what they're exactly doing. Fortunately, you don't have to spend Genelec-type money to get a decent result...something like these will be more than sufficient: https://www.sweetwater.com/store/detail/ErisE8XT--presonus-eris-e8-xt-8-inch-powered-studio-monitor Easy-peasy stuff...just connect your left and right line audio outs to the inputs on the monitors, and there you are!
...kinda. You also need to place these properly, which means you'll want some stands (like these: https://www.sweetwater.com/store/detail/SMS6600P--on-stage-stands-sms6600-p-hex-base-studio-monitor-stands) to get the monitors off the desk, and up and behind it somewhat. Again, you don't want the speakers right in your face, but they need to be back from you and angled so that they "aim" toward a wide "sweet spot" that needs to be where you are when you mix. About 6 feet between them should work, but the rule of thumb is that you and the pair of speakers should form the points of an equilateral triangle, at least in a small desk rig. Lastly, add these: https://www.sweetwater.com/store/detail/MoPAD--auralex-mopad-monitor-speaker-isolation-pads as they are definitely NOT snake oil, but help to decouple the monitors from the surface they're sitting on so that they're not damped by the inertia of sitting on a solid surface. This really opens up the bass and low-mid, and I've used them for decades now because they work.
All of this should be more effective than simply chasing VSTs. Sure, it's more expensive...but the results bear out the costs.