Left to right:
A nice butane-heated portable; this one's a Wahl but you can find the same thing marked for other brands. Puts out plenty of heat and works well, though a really high wind can be a problem.
Antex fine-point iron, one of the very best tiny irons out there.
A pair of small Wellers, inexpensive general-purpose soldering irons and my go-to model for years. The solid-copper tips do get eaten up over time but you can file 'em down until they get too short for even that. If you can only buy one iron and you want to purchase locally, this may be your only option That's fine -- they work well.
Next, a big Hakko, 60W or more. The "handle" unscrews and can be threaded over the tip for storage and transport, very handy.
Even bigger and my general-purpose iron for tube-type radios, an American Beauty 75W. This is an industry standard, one of the best irons made. Tips are solid copper.
Speaking of copper, here's the soldering copper again.
Last, an absolute warhorse, a 225W American Beauty. The guy who was selling it had several and said they all heated up. I'm not in a huge hurry to try, but this will solder chassis together, if needed.
Not shown, soldering guns. I own two and use them in disassembly; I find them too awkward for serious building. Plus the tips are small, which means they cool down when you solder.
Also not shown, torches. I have a couple of small butane torches, which will do a lot of small work. I'd own a MAPP-gas torch, but I have access to one at work. (MAPP gas these days isn't the real thing but it's still hotter than propane.)
You'll note that most of these irons -- I think all -- have copper tips. There's a reason for that. While a well-known bench iron has used plated iron for years and tout its durability,* if the plating gets damaged -- say, by using the iron tip to undo some solder-soaked knot on a terminal in a 60+-year-old radio -- it's just about impossible to restore. Copper, you just file down.
Also left out, a selection of little sponges in metal trays. A damp sponge is an excellent way to keep an iron tip clean during use. The "potscrubber" tip cleaners are okay but a bit aggressive. I've also got a little block of sal ammoniac for the tough cases, and rosin paste flux for difficult-to-solder items; both very handy.
You don't need a jillion soldering irons -- but it's nice to be able to select the right size for the job.
* The main reason for the iron tips is their clever Curie-point temperature control. You can select tips by temperature! This has to be weighed against the need to treat them nicely, so it depends on your application.