Literally every pasta that lives in Slendy's mansion has at least 1 plaid. Jeff has a red plaid. EJ has a blue-black plaid. LJ has a black and white plaid (duh.) BEN has a greed plaid (you see a trend yet?) Sally has a pinkish-purplish plaid. Toby has an amber-gray-blue plaid. Masky has a grayish plaid (betcha didn't expect that) Hoodie has an orangish plaid. So yes, some may have more than others (EJ has 42 and counting) but they all have one confirmed.

(Dude I'm literally EJ. No joke.)