I feel I should give a list of Stands in my oneshots before going on.
 
User: Anonymous
Stand: [GRAND CANYON]
Power: A
Speed: B
Range: A
Durability: E
Precision: C
Potential: A
Ability: Remove conditions, whether physical or conceptual, and place them back at any time. (Example: Removing the condition of Celestia's hold of the sun. Removing the condition that the Mane 6 uses the EoH)
 
User: Twilight Sparkle
Stand: [HUMBLING RIVER]
Power: E
Speed: C
Range: A
Durability: D
Precision: B
Potential: A
Ability: Grants any being the ability to use Stands and trace them wherever they are in the world.
 
User: John Doe
Stand: [MADE OF STONE]
Power: C
Speed: B
Range: A
Durability: C
Precision: E
Potential: A
Ability: Contains concepts from the world, such as pain or genitals. Can use to transcend between dimensions and realities.
 
User: Jane Doe
Stand: [MY IMMORTAL]
Power: C
Speed: D
Range: E
Durability: E
Precision: E
Potential: A
Ability: Can store knowledge via brain, computer, book, etc. and bring about any information to aid the user, whether asked or in danger
 
User: Rarity
Stand: [GIVE IT AWAY]
Power: D
Speed: B
Range: C
Durability: C
Precision: D
Potential: C
Ability: Can manipulate doubt, uncertainty, and skepticism
 
User: Sweetie Belle
Stand: [TELL ME BABY]
Power: C
Speed: B
Range: D
Durability: C
Precision: C
Potential: E
Ability: Manipulate the user into speaking the truth about themselves
 
User: Limestone Pie
Stand: [WHEN THE LEVEE BREAKS]
Power: B
Speed: D
Range: E
Durability: A
Precision: B
Potential: D
Ability: To flatten an area around the user in relation to the rest of the area around them in a 5 mile radius. Is also a sledgehammer
 
User: Maud Pie
Stand: [STAIRWAY TO HEAVEN]
Power: C
Speed: B
Range: B
Durability: A
Precision: B
Potential: D
Ability: To cut, divide any or all materials and build upon them. Seemingly about to manipulate the earth.
 
User: Applejack
Stand: [ROTTEN APPLE]
Power: C
Speed: B
Range: B
Durability: B
Precision: C
Potential: C
Ability: Split into many tree-like entities to rot materials away, or combine into one giant tree-like entity to restore it to a previous state
 
Discord's [CONSTANT MOTION] doesn't count.
 
User: Rainbow Dash
Stand: [MONSOON]
Stats unavailable
Ability: To use the wind to go fast, but the drawback of the winds behind her to whip up like a hurricane
 
User: Princess Celestia
Stand: [KYRIE ELEISON]
Power: A
Speed: A
Range: A
Durability: B
Precision: B
Potential: C
Ability: Nullifies any effect of Stands attacking her (Withstanding Discord's Stand ability to wipe out memories) and summoning meteors from space
 
User: Princess Luna
Stand: [GLORIA DEO]
Power: A
Speed: B
Range: A
Durability: B
Precision: B
Potential: D
Ability: To use the shadows to manifest spikes or Luna herself and use pebbles from her moon as projectiles
 
User: Fluttershy
Stand: [SOLITARY SHELL]
Power: C
Speed: A
Range: C
Durability: B
Precision: E
Potential: B
Ability: A fully alert Ursa Minor that spews out random animals from it's maw.
 
User: Pinkie Pie
Stand: [PARTY PARTY PARTY]
Power: C
Speed: A
Range: A
Durability: C
Precision: B
Potential: A
Ability: Anything. Literally anything, as long as she is in a happy mood
 
and because I fucked up and thought I didn't use Rainbow Dash, here's her stats
 
User: Rainbow Dash
Stand: [MONSOON]
Power: C
Speed: A
Range: B
Durability: D
Precision: E
Potential: E
Ability: To use the wind to pick up speed, but the drawback of the wind behind her to whip up like a hurricane.