That would be a mag build.
They can sustain stam like no other

(PVE) Stam Necro bow/bow, w/ Lava Foot Soup food, 7 medium, vampire.

Imperial: 1x big HP enchant (Best sustain - overkill)
Orc: 2x big HP enchant (Best dps - good sustain)
Khajiit: 2x big HP enchants and 1x small enchant (Middle ground of DPS and sustain between the 2)

You will still have enough HP with ebon, minor toughness, necro passive, racial passive and enchants, but you will have +490 recovery from food. Add +200 stam reg from summons and high multipliers from 7med, vampire and cp, your stam regen will be higher than any other setup.

If you needed a little extra proactive sustain you have Mortal coil for about 190 stam/sec for 12s from a corpse, Major Ward/Resolve buff for cost reduction on Blastbones and Skeletal Archer, and lastly self synergy via Boneyard.

It's a very fun bow/bow setup. Use the typical bow/bow setup with Warband and Relequen, with Stormfist or Veledreth monster set. You get 3 flex spots with all major dps abilities slotted. I have acid spray, bitter harvest and vigor. Ult gen is nuts and sustain is awesome. Major Vulnerability is very strong and unique to get your invite to trials.

Only downside is no access to major brutality, but everyone runs weapon power pots anyway. I just run without them in solo or pug groups, pop them on important bosses to save money.

a redguard stamsorc with rapid strikes as spammable, and use dubious food with 1 health glyph. If the support you receive in groupcontent is good, switch to blue food. The orc race does more dps but is not as easy to sustain. And you wanted something that sustains well.