Very much appreciated that you have put together this list, milady Rosa. I have a couple that I have also used in the past-- I think one of them is called 4GB Patch or something. I know there's a utility also which is supposed to enhance Oblivion's use of extra cores. Maybe that is 4GB patch, I don't remember. Whatever it is, I remember it really made a difference with performance for me.
Of your list, I occasionally use Oblivion Stutter Remover, set to 30 fps, and only when we go into Better Cities towns. The rest of the time, I haven't got this running. Getting 60 fps out in the countryside is glorious to me!

It's a wonder, after years of 30 on the consoles. Because of this, I've never seen a need for Quarl's or any other visual add-ons.