A template is a good solution if it’s the basic layout you want.
I’d use a saved preset because it is faster to switch back and forth with the preset being built. I bounce around grabbing blocks from various presets to recombine into something else, but it doesn’t have to be a working preset, it can be a container only holding preconfigured blocks. Open it and copy a block and switch to the destination preset, paste, then save it, then switch back. Hold down Command on the keyboard and click the Preset button and it’ll show the previously used presets so it is easy to alternate back and forth.
These are kludges because Edit doesn’t have a concept of a default block. I suspect that is because Edit isn’t really the boss of the modeler, it’s more like a terminal to a mainframe that has developed some scripting abilities over the years. If the front panel doesn’t have something the editor didn’t either at first, but some wishes/ideas were more easily implemented there so it’s grown as time passed. Maybe it will get a “default” designation for blocks eventually, but with the Library and other workarounds the need isn’t that pressing.