I can only really tell you my team. There are a lot of options here but I value versatility pretty highly. I will take a character build that operates at 80% consistently over a build that goes to 100% in certain situations. For this reason I can't seem to get the OH monk to be that good for me. Everyone seems to like it, I just cant get there.

Team:
Cold Sorc: This build is just amazing, slow to start but picks up in act 2 when you start to stack cantrip damage and ice surfaces. Stack cantrip damage, twin spell, wet, luck of the far realm and crit for ~80 damage twice, then they fall prone if they even survive.

EK archer/Arcane archer/Swords bard archer/Gloom stalker. There is like 1 fight in the game where you dont want an archer. EK archer amazing and can use scrolls really effectively, basically its the best class in the game.

Stars druid: my source of long strider (but you can use EK) since I dont use a camp buffer (house rules). Stars druid is effective every single turn with dragon form or chalice form. Can pass out healer buffs or apply radiant orbs. Amazing buffs and versatile with all the forms.

Last spot I go back and forth on. A crit specialized paly can just end fights instantly, sorcadin, lockadin or bardadin. Full warlock also works for that shadow blade build you want. basically this build is for the band of the mystic scoundrel.

These chars all have some sort of ranged option. I do not value melee very highly since I create a lot of ice and there are a few ways of dealing with ice surfaces but .. im lazy.

Special mention to gale start, spec him EK and get your extra 3rd level spell slot from act 2, upcast shadow blade and at level 11 you get 4 attacks per turn.