Good mods

[zeeyone]

Recommend some good mods for a single player playthrough, please! (no calamity, thorium, or overhaul cause I know about those already)

[jonasaboo]

Yet another boss health bar (adds a health bar on the bottom of the screen when a boss is nearby, also works with minibosses like Mourning Wood, Everscream, Pirate Captain etc)

Boss checklist (A checklist for bosses)

Recipe Browser (Lets you browse recipes)

Those are the mods I recommend. They aren't too big

[Sir Fancybritches Fizzlebottom]

More accessories (The one with heart of nature). It gives two additional accessory slots and is dropped by plantera.
I don't recommend updating terraria overhaul to latest version. The resizing tile array function runs me out of memory.

[Zeivo]

(finally someone who doesnt want calamity)
litho's armory
uhh
split mod
T R E M O R MO D
(quiet community)
equipable inventory
joost
elements
pretty much all
that comes to mind for me

[crypticAries]

Vein Miner

Spirit Mod

and Tremor Mod