Another way to go about it would be to have the band volume reduced. Again, that's probably not going to happen, but it would work wonders for your problems.
Wearing earplugs is just adding more complications to hearing all of the things you need to hear.
Yeah, I run the sound in my band, too. That's why I don't use in-ears, as well. I need to hear what's happening in the room, and if someone is trying to get my attention I need to know that, too.
I do have my own monitor mix for my personal monitors (I use two monitors).
Our monitors are actually lounder than the band as a whole. We have loud monitors and run the mains relatively quiet, for the sake of the audience. Each person onstage can have whatever vocals and instruments they want at their own chosen levels.
That way, each person can have "more me" in their own speaker monitor. The mains are at a sane level.
You'll have to tame this beast or it will cause you to oversing. You need a monitor with a lot of your own vocals in it, and at some level below what will cause your molecules to disintegrate. If your band sounds like a 747 taking off, you might want to see if there are some alternative methods to getting the sound you want both onstage and out front in the house.
If the volume levels are a nuclear arms race, your voice will ultimately lose that escalation. Score: Marshalls on Ten, Vocals nothing. Amplified Instruments can go all night long, night after night on 10 or 11; they can blow a speaker and load up a new one and keep on going. Your voice can't compete with that. Not for long...