Oh boy, I have a lot that I tend to use, it depends on the playthrough but I do have a small stock of player homes I keep for any playthrough occasion!

This part of the list is some of my more favorite player house mods that I've used often.

Vandfald Cottage by Thay S

Tel Aschan by Elianora

Severin Manor by Absorbed

Proudspire by Doxmazz

Leaf Rest SSE by Aukmat/mnikjom Side note about this one, to get the key you may need to TCL into the mailbox.

Cynn's Honeyside Redone by Cynndal

Cynn's Vlindrel Hall by Cynndal

Cynn's Hjerim by Cynndal

Breezehome by Lupus

Nightgate Cabin by RyoHab

Skaal You Need by Elianora

Sarethi Manor by TWarrior

Ash's Rest by teahunter121

Assassin's Sanctuary by K13RAN64 It's not subtle, but sometimes you just need an edgy manor house.

~Honorable Mentions~

These are my less-used player homes I have but ones I still adore regardless.

Crypt of the Old Guard by ToggleAI

Varbaril by DexMods

Unique Vampire Dens by Gonkish

Trollpacka by Thunderstorm95

The Northern Star Retreat Revised by ArchimageKhan

Routa by Elianora

Riftvale Lodge by Cynndal

Cliffside Cottage by Cynndal

I have a couple more but this is already a pretty long list, I was also going to add Tel Jerdein but saw you already had it mentioned as well. :)

I had sort of the same problem when modding my summoner/sorcerer playthrough a while back, a lot of Necromancy stuff but not as much for the Daedric side of things. Now I love me some Necromancy, but it was a little frustrating not being able to find as much love for Daedra.

Someone else could probably recommend better as my recommendations here primarily come down to spell mods, but you mentioned a scholarly interest so something I can recommend is the Spell Research mod. I can't remember much about it as I haven't played with it enabled for a while, but it adds something extra rather than just getting spell tomes the normal way.

You already mentioned Mihails mods but I did the same, just added as many Daedra as I possibly could.

Not really Daedric-themed but this one adds more immersion to the College of Winterhold and lets you do quests for every school of magic, College of Winterhold Quest Expansion.

I might be able to recommend some house mods but the ones I used on my summoner playthrough were Dunmer-themed, and I think I just ended up using JK's College of Winterhold at the end of it.

Spell Research: https://www.nexusmods.com/skyrimspecialedition/mods/20983

College of Winterhold Quest Expansion: https://www.nexusmods.com/skyrimspecialedition/mods/66666

JK's College of Winterhold: https://www.nexusmods.com/skyrimspecialedition/mods/65676

Edit OH I also forgot, just for the scholarly side of things there's The Eloquent Reader, gives you some speech experience for reading books. https://www.nexusmods.com/skyrimspecialedition/mods/16338