Advice on Dragon types

[Daniel the Dragon Master]

Hey there Perfect Pokemon Community!

I was wondering if anyone could help me make sure the movesets and abilities to the Dragon types I currently have are good and any areas of these Pokemon I can improve on that you know.

Below are all the Dragon type Pokemon I have.

Turtonator (M) @ Focus Sash
EVs: 4 HP/252 Sp. Atk/252 Speed
Ability: Shell Armor
Level: 100
Nature: Timid
- Shell Smash
- Flamethrower
- Dragon Pulse
- Flash Cannon

Kommo-o (M) @ Assault Vest
EVs: 252 HP/252 Sp. Atk/4 Sp. Def
Ability: Overcoat
Level: 100
Nature: Modest
- Clanging Scales
- Focus Blast
- Flamethrower
- Flash Cannon

Drampa (M) @ Leftovers
EVs: 248 HP, 252 Defense and 8 Sp. Atk
Ability: Berserk
Level: 100
Nature: Bold
- Dragon Pulse
- Hyper Voice
- Substitute
- Calm Mind

Guzzlord @ Choice Band
EVs: 252 HP, 252 Attack and 4 Sp. Def
Ability: Beast Boost
Level: 100
Nature: Adamant
- Dragon Claw
- Crunch
- Earthquake
- Poison Jab

Salamence (M) @ Salamencite
Ability: Intimidate
EVs: 248 HP / 124 Atk / 136 Spe
Adamant Nature
- Double-Edge
- Roost
- Facade
- Dragon Dance

Goodra (M) @ Assault Vest
Ability: Sap Sipper
EVs: 240 HP / 252 SpA / 16 Spe
Modest Nature
- Draco Meteor
- Fire Blast
- Sludge Bomb
- Muddy Water

Zygarde @ Life Orb
Ability: Aura Break
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Dragon Dance
- Earthquake
- Outrage
- Stone Edge

Garchomp (M) @ Life Orb
Ability: Rough Skin
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Swords Dance
- Dragon Claw
- Earthquake
- Fire Fang

Exeggutor (M - Alolan form) @ Sitrus Berry
Ability: Harvest
EVs: 252 HP / 212 Atk / 44 Sp Def
Adamant Nature
- Protect
- Swords Dance
- Wood Hammer
- Dragon Hammer

Haxorus (M) @ Life Orb
Ability: Mold Breaker
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Dragon Dance
- Outrage
- Earthquake
- Poison Jab

Dragonite (M) @ Lum Berry
Ability: Multiscale
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Dragon Dance
- Outrage
- Earthquake
- Fire Punch

Flygon (M) @ Leftovers
Ability: Levitate
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Roost
- Toxic
- Earth Power
- Draco Meteor

There are a few Pokemon in this list I have questions about on movesets as I feel I could get a lot more out of them. (Exeggutor, Salamence and Drampa).
Thanks and hope to hear back soon!

(Apologies if I posted this in the wrong area)