Bruce Campbell as Ash

Toni Collette, Hereditary

Sam Neill, In the Mouth of Madness

Love me some Jack Nicholson in The Shining.

Demi Moore, The Substance

Everyone in the sixth sense.

Mia farrow on rosemarys baby.

Al pacino in devil's advocate if that counts as horror.

Kathy Bates in Misery, as she ramps up the crazy I get chills every time

Robert Shaw and Roy Scheider in Jaws, Shaw with the 'Ahab captain' and Roy with the 'it's not paranoia if there's a real monster out there' sheriff.

Oliver Platt in lake placid, goofy and scared and the scene with him in the water is great

Theater of blood/house on haunted hill super campy Vincent Price, he did some radio shows too just hearing him do his creepy voice is always fun, but those two he's very over the top & melodramatic.

Dennis Quaid in Event Horizon Pandorum

But also I meant the Jurassic Park guy in Event Horizon

The guy who played the military leader in the bunker in the original "Day Of The Dead". Such an asshole that his death felt like the moment the whole film had been building to.

Danny Huston as Marlow in 30 Days of Night.

Brad Dourif (pick one, they're all great).

My personal favorite is Tucker Cleaveland from Graveyard Shift.

Jim Carey in The Cable Guy.