What are the best counters for each of these Pokemon?

i use vaporeon (aquatail) 2545pc vs all ;-)
100% victory for the moment

My opinion the ones I use

Snorlax --> wigglytuff, vaporeon
Lapras --> Arcanine
Vaporeon ---> executor, venosaur
Arcanine ---> vaporeon , golem, rhydon
Dragonite --> Lapras
Charizard ---> vaporeon

I love my legacy move set Golem , mud shot/earthquake it charges earthquake for stab so fast. Here in Chile The Metagame is not ruled by vaporeon , Arcanine is the most common attacker and defender

Snorlax -- Anything strong, no great direct counter; I always use Vaporeon, Dragonite works well too
Lapras -- Arcanine, Flareon isn't great but also works okay
Vaporeon -- Venusaur, Victreebel
Arcanine -- Vaporeon is all you need
Dragonite -- Lapras, Dragonite with Dragon Breath, Dewgong, Cloyster, Seadra are all low CP counters
Charizard -- Golem, Vaporeon

• Snorlax, I use Machamp, but basically anything with high CP, Snorlax has no real counters
• Laparas, Arcanine (Firefang and Fireblast or Flamethrower) or Magneton
• Vaporeon, I use Parasect with solar beam
• Arcanine, Vaporeon with Hydro pump
• Dragonite, usually just use a jolteon and dodge as much as I can
• Charizard, just use Vaporeon

Snorlax - Dragonite / Vape / Wigglytuff
Lapras - Arcanine
Vaporeon - Dragonite / Exeggutor
Arcanine - Dragonite / Vaporeon
Dragonite - Lapras / Dewgong / Cloyster with Frostbreath/Blizzard or Wigglytuff if he doesn't have steel wing
Charzard - Dragonite / Vaporeon

Snorlax - Wigglytuff, Golem, Rhydon, Vaporeon, Arcanine, Dragonite all do just fine

Lapras - Arcanine, Magneton, Flareon

Vaporeon - Tangela, Parasect (with Solar Beam), Venusaur, Exeggutor

Arcanine - Insert one of 40 Water Pokemon here. If they are all fainted, then Golem/Rhydon

Dragonite - Lapras, Dewgong, Cloyster, Dragonite, Magneton

Charizard - See: Arcanine

Golem is a really good alternative to varaporeon when fighting Charizard . Usually defence Charizard goes with wing attack and golem is strong against flying and fire . Besides that he is super efective 1.56 using Stone edge

• Snorlax: Machamp with fight moves
• Lapras: Golem with rock moves
• Vaporeon: Venusaur, Victreebel and Vileplume with grass moves
• Arcanine: Vaporeon, Blastoise, Golduck and Poliwrath with water moves or Golem with rock or ground moves
• Dragonite: Lapras with ice moves (doubly super effective)
• Charizard:Golem with rock moves (doubly super effective)

Snorlax - Arcanine/Lapras/Dragonite
Lapras - Arcanine/Golem/Flareon
Vaporeon - Jolteon/Raichu/Victreebel
Arcanine - Vaporeon/Gyarados/Blastoise
Dragonite - Lapras/Gyarados/Dragonite
Charizard - Vaporeon/Gyarados/Blastoise
These are what I use from most prefered to less prefered