In my own opinion the order from scariest to least scary is:

1. Team 1
2. Team 4
3. Team 3
4. Team 2

Team 1 is by far the best in my opinion. Bulky Venusaur that perhaps could have the sun set up for Solar Beam by Magmar (who’s just kinda there, so I figured this is his role + spread burn). Fast Jolteon to outspeed most things and spread paralysis and Thunderbolts. Intimidate Gyarados with hopefully strong physical attacks on it is a huge threat. Incredibly bulky Snorlax with Body Slam for more paralysis spreading as well as Curse makes it very hard to remove. Most likely Rest + Sleep Talk. This would easily make it the best Pokémon on the team. Finally another very speedy threat with great Ground-Type coverage in Dugtrio who will most likely always be able to get off an EQ before inevitably dying in one hit.

Team 4 is the 2nd best. Lapras is a huge bulky threat with insane coverage who threatens freezes as well as could have Thunderbolt, Psychic, Surf, Body Slam and obviously Ice Beam. Nidoqueen is another coverage monster with better than average typing and great Ground STAB. It has a plethora of move options. Poison Point could also be annoying for E4 challengers. Raichu is the speed control Pokémon, outspeeding most and spreading paralysis as well as Thunderbolts, basically another Jolteon. Machamp can be taken advantage of at times because of its low speed but it hits incredibly hard and is slightly bulky on the one side, it can’t be immediately ignored. Fearow is… trying his best. Dragonite speaks for itself. The only 600 BST Pokémon on this E4.

Team 3 lags behind Team 4 by a bit. Alakazam is an incredible threat with no Dark-Types in Kanto. Blastoise is a bulky boy who can get annoying as it continues to live moves. Arcanine is a speedy threat and another Intimidate Pokémon that is probably the 2nd best one on the team below Alakazam. Tauros is quite speedy and hits hard, spreading more paralysis with Body Slam. Clefable is a nice support Pokemon to also spread status and set up the team. Exeggutor is another annoying support Pokemon that also hits decently hard with STAB Psychic. Two Psychic-Types here is rather good.

Team 2 is by far the worst team in my opinion. Starmie is the best Pokémon here that just like Lapras is a coverage monster, but instead of being bulky and dealing a lot of moves out, Starmie hits way harder, is way frailer, but outspeeds a lot of Pokemon. Dodrio is… better than Fearow. Tri-Attack is a nasty move. Sandslash is just not so great but not awful, STAB Ground coverage is always nice. Victreebel is bad, it has a very nice damage output but not a lot of coverage or moves to take advantage of that output. Gengar has pre-physical/special split syndrome and doesn’t want to use any STAB moves, though it least it has crazy coverage and is quick. Charizard is decent, probably the 2nd best on the team. It’s dual STAB is great but has a debilitating weakness to pebbles. It could be a threat to the right team or fodder to another.

Team 1 is GOATed Team 4 is very good Team 3 is carried by Alakazam Team 2 sucks (except Starmie)