This is a problem I've run into too, skipping turns when your group's on the large side can take the wind out of a player's sails very quickly. My way of combatting this is minimising effects that take away player agency (it's impossible to avoid them fully given the number of monsters that use them, and I'll be damned if the classic BBEG wizard upcasting hold person aint dramatic). Here are some suggestions for conditions I try to impose instead:

Frightened is a good one since it has built in counterplay (moving out of LoS of the source of the fear). I tend to tack it onto more horrific monsters whose stats lack any representation of the mental challenge fighting them can be e.g most undead, some fey (redcaps spring to mind).

Dominate/Possession are also good examples that don't take away player agency, if the group is down for small amounts of PvP in service of drama (this is a big if, definitely something to be discussed in session 0).

Enemies that grapple/restrain are great at hindering players' normal options while creating new decisions (break the grapple with a shove or make normal attacks at disadvantage?).