"No Fizzle" as in this is not intended for the default Unit Frames or "No Fizzle" other addons don't do what I want, do way more than I want, do...?
I can only speak to Discord (although I'm fairly certain some other UF addons are of much the same ilk) which, it seems to me can do what you are talking about but I admit, DUFs configuration panel is an extremely daunting interface at first glance. Sadly it needs to actually fit on the screen
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It does allow for custom textures, backgrounds, independent moving, sizing, parenting of bars, texts, icons, portraits, class bars etc. and lots of other stuff as well.
Your image/post didn't mention 8 point click/drag sizing and while DUF uses sliders, they also have an attached entry box for final precision sizing. If you know Wows drag mechanism, it is not precise no matter which way you implement it.