what about Azelf? It has access to U-turn or Explosion for momentum, has access to stealth rock if you need it, as well as taunt alongside a decent 115-speed tier. It has flaws but I'm surprised it's #120 on the usage chart, so I wonder why it's not so good in practice now when a generation or two ago it seemed to be pretty common.
I don't think azelf is totally unviable as a screens setter, but I think it gets directly outclassed almost all the time.
If you want to run taunt and u-turn, Koko is faster and bulkier in both defenses (assuming you are max speed max hp for both, and admitting that the difference in special bulk is virtually nothing).
If you want to run explosion and u-turn, then you face some competition with regieleki. This is a more even comparison, since azelf trades speed for a stronger boom and slightly better bulk (assuming both are maxing out attack, with azelf uninvested in hp and regi running 96 hp evs, although I don't know if that is still optimal).
However, I feel that an underrated aspect of regieleki, as weird as it might sound, is actually it's one-dimensionality. Threatening a strong electric move from a fast attacker can force a lot of switches, and this can lead to some of the easiest double switches of your life. You can also take advantage of this to run rapid spin over explosion, clearing hazards on switches with regi, which you cannot do with Azelf.
Grimmsnarl and Ninetales-Alola each have a well defined niche that neither of the electrics can cover, giving even less reason to use azelf (even if they don't compete with it as directly).
I suppose you could run screens + explosion + stealth rock, but I think this is suboptimal because using stealth rock means that either you lose a turn of screens or you give your opponent a free switch before setting screens up, and unlike taunt you aren't using this turn to prevent your opponent from removing your screens (plus booming right away means no screens for the rest of the game).
If you do want to use azelf, I think it might be best as a suicide HO rocks lead with focus sash like in the old days. Explosion Landorus definitely does this better as a whole, but azelf has a slightly faster speed and access to taunt to set itself apart, and can use fire, ice, or electric coverage in the fourth slot which can be handy on occasion.
also you could always run life orb with some mix of psyshock, NP, flamethrower, t-bolt, energy ball, knock off, and explosion (usually a kind of weaker but faster nidoking) like an insane person but I promise nothing [EDIT: lol wow so upon doing some calcs in turns out life orb timid azelf and sheer force life ord timid nidoking actually are identical special attackers (maybe nidoking does like one or two hp more damage), which is better than I anticipated, I may look into this at some point for meme set]