These are the ones I use, but I’m fairly minimal with the addons I need atm.
Foundry Tactical Combat (FTC) - This addon provides classic MMO style character frames for you Health, Magicka, and Stamina bars. It also provides floating combat text and displays active buffs/debuffs. You can edit each of these aspect to tailor your HUD the way you like it.
Skyshards - Displays nearby skyshards on your compass, as well as on your map/mini map.
Lore Books - Displays nearby Lore Books on your compass, as well as on your map/mini map.
Loot Drop - Temporarily displays items and XP gained.
Mini Map by Fyrakin - Adds a traditional style mini map to your UI. Location/Size can be modified to suit your tastes.
I would suggest downloading the “Minion” app from ZAM. Makes it all really easy.