A lot of good suggestions already. I'd like to echo the recommendations for you to test out some modern throwing putters, due to your preferences for:
a) relatively flat, shallow discs with small or no bead
b) slower molds that are easier to get up to speed
These two preferences are basically contradictory, since making a disc flatter and shallower will also make it faster. So to drop the disc back down in speed, you need to introduce another variable...which likely means shrinking the diameter a bit.
So what do you get if you take a modern, sleek throwing mid and shrink the diameter? Someone who knows more about physics can correct me if I'm wrong, but I believe the answer is that you now have a modern, sleek throwing putter.
I'd start with trying out the Envy and Proxy. They are basically the gold standard when it comes to driving putters, as both can handle more wind and torque than you'd expect from a putter and they go very far. They also seem to like being thrown on a slightly lower line than most putters, just like mids do. They really aren't the floaty/glidey discs that most people think of when they think of putters. If those don't work out for you, Innova's Stud and Colt combo is also very good, as well as the Westside Maiden and Lat64 Pure.
Lastly, I'd recommend dusting off that old Meteor you mentioned. Don't underestimate the value of understable discs on days where you're struggling to get discs up to speed. Understable molds can be lazers if underpowered.
a) relatively flat, shallow discs with small or no bead
b) slower molds that are easier to get up to speed
These two preferences are basically contradictory, since making a disc flatter and shallower will also make it faster. So to drop the disc back down in speed, you need to introduce another variable...which likely means shrinking the diameter a bit.
So what do you get if you take a modern, sleek throwing mid and shrink the diameter? Someone who knows more about physics can correct me if I'm wrong, but I believe the answer is that you now have a modern, sleek throwing putter.
I'd start with trying out the Envy and Proxy. They are basically the gold standard when it comes to driving putters, as both can handle more wind and torque than you'd expect from a putter and they go very far. They also seem to like being thrown on a slightly lower line than most putters, just like mids do. They really aren't the floaty/glidey discs that most people think of when they think of putters. If those don't work out for you, Innova's Stud and Colt combo is also very good, as well as the Westside Maiden and Lat64 Pure.
Lastly, I'd recommend dusting off that old Meteor you mentioned. Don't underestimate the value of understable discs on days where you're struggling to get discs up to speed. Understable molds can be lazers if underpowered.