I think you should wear a PC with a bowtie and either a waistbelt OR a 3-button waistcoat. The belt looks better, to me, on men that are short and stocky, the waistcoat better on taller men. I think the broad expanse of white shirtfront on a taller man is prone to looking untidy.

My advice- Don't wear a 5-button waistcoat with a PC, don't wear a waistcoat with a belt, don't wear a four-in-hand tie or "ruche" tie with a PC or doublet, and don't wear a tartan bowtie or necktie with a kilt.

Cordially,

David