Thanks for the correction TJ, I mis-read that and thought those gauges were working.
I use a Hexacon iron, but they don't make these anymore but you can find NOS on eBay. It's a little higher quality than an American Beauty. Both are American made and last and last. There is no adjustment or control, it just plugs in and heats up but I can control the process with the tip I choose/make. It takes ordinary 3/16 copper slugs for tips so I buy the copper in 6 foot lengths and cut off approx 3" lengths and file the profile I want. It can be short and blunt for heavier joints or longer and filed to a thin point for finer work. Soldering isn't about the temperature of the iron, it's about the volume of heat transferred, too much and you damage the board, too little and it doesn't flow.
I also have a solder station, mine is an AOYUE 968. standard sort of rig with a small adjustable pencil iron and a adjustable heat nozzle. I only use the pencil iron from this one on very small jobs since it doesn't have much capacity and will get cold fast if asked to heat a large joint. It sits beside the microscope for changing very fine ICs.
Lastly I have a portable butane soldering pencil in the trailer for emergency repairs on the road. These can be expensive but they go on sale about twice a year around here. They are a little harder to control but they actually have lots of capacity so they are great for trailer repairs where you're trying to solder two 12 guage wires together. I can adjust the flame in mine so I was able to turn it down really low and change stepper motors in my cluster on a picnic table once. It also helped with a fan clutch wiring harness one time - a very handy tool.