Thanks for pointing out the tag text plugin, Yura G. I didn't know about that one, and it looks like it'll do all I wanted and then some.
The thing is, I normally avoid using third-party plugins since they aren't guaranteed to be supported and I've often found them to be buggy. It sucks to invest time into integrating some plugin only to realize it isn't reliable and/or isn't supported by the author. I might break down and use this one since rex is so active, but I would still love to see official support for more text options.
I don't make direct changes to official plugins btw, for the reason you mentioned. I made a copy of the text plugin with my changes to test that what I was asking for could be done easily. But still, I wish I had named it "Super Text"... I called it "Text Stroke" which now seems very boring.