Not much left since everyone took the ones that are
somewhat viable in Ubers. Rock types that don't take too much from EQ due to extreme physical bulk are generally the answers, here's one that takes zero from EQ:
Solrock @ Leftovers
Ability: Levitate
EVs: 248 HP / 8 Atk / 252 Def
Impish Nature
- Stone Edge
- Morning Sun
- Toxic
- Stealth Rock? / Trick Room? / Magic Coat? / Will-O-Wisp?
Unlike other Rock types, this one has reliable recovery so you can switch in throughout the match. You also don't have to take up two slots for Rest-Talk.
Bird Vs Sun
196+ Atk Life Orb Ho-Oh Sacred Fire vs. 248 HP / 252+ Def Solrock: 90-105 (26.2 - 30.6%) -- 4% chance to 4HKO after Leftovers recovery -- 5HKO tbh
196+ Atk Life Orb Ho-Oh Brave Bird vs. 248 HP / 252+ Def Solrock: 108-127 (31.4 - 37%) -- guaranteed 4HKO after Leftovers recovery
Ho-Oh Earthquake vs. Levitate Solrock: 0-0 (0 - 0%) -- Lol
Sun Vs Bird
8 Atk Solrock Stone Edge vs. 248 HP / 0 Def Ho-Oh: 456-540 (109.8 - 130.1%) -- guaranteed OHKO
But BURN!!11!!!1
-2 8 Atk Solrock Stone Edge vs. 248 HP / 0 Def Ho-Oh: 232-276 (55.9 - 66.5%) -- guaranteed 2HKO
The above calc shows a burned Solrock's Stone Edge against Ho-oh. However, Ho-oh is faster, so if it Roosts you do this much;
-2 8 Atk Solrock Stone Edge vs. 248 HP / 0 Def Ho-Oh: 116-138 (27.9 - 33.2%) -- guaranteed 4HKO
This is where Toxic comes into play. And yes, a burned Solrock can still stall out Ho-oh, as Morning Sun + Lefties recovery outdoes LO Brave Bird + Burn. Furthermore, if you do run Trick Room on the last slot (TR team maybe), the problem of Ho-oh being faster and trying to Roost stall you is nullified, so you could even replace Toxic with something else of your choice.
P.S - Like most
true Ho-oh answers, I know this is shit against everything else. But if you run Will-O-Wisp for the last slot, it does well against Physical Groundceus and non-sub M-Salamence.