That sounds like an excellent solution.
I'm very into reducing the amount of drilling, grinding , sawing, etc, that any given job requires.
Some times the material you chose makes the difference.
'Round here, T posts don't generally come with holes, and the metal is very tough, so when I do use them it's usually with tie wire, hose clamps or even zip ties to securing them to the rest of the structure.
When I have even a short piece of 1.5" PVC pipe, I keep it, because it with readily taken a screw and it slips right over a t-post without much fuss.
I will sometimes use what is called a U post.
They do have holes already punched in them.
They are are strong in one direction, but prone to folding in half in the other.
As the posts on sides of a raised bed, they are excellent, but as a fence post, not so much.
Two of them, one on either side of of a wooden post, would work as well as one stake made of angle iron, but with less work.
Way more obvious/ugly than we are looking for but it is a strong option.