Suggestions for a Dark Ghost type team?

Hello I am playing a randomizer run though as my most recent play though and I was looking for suggestions for a dark ghost team. I know I am going to use and already have armored tyraintar, Delta (armored when I get the armor) Volcarona, Giratina. Any suggestions welcome though I do wish to make sure that my team is no more than 4 dark type or 4 ghost types.

Maybe try delta pidgeot it’s a dark/dragon type

Might want a steel ghost/dark for the pesky little fairies

i’d suggest dieno because the pure power hydriegon has