So Dave is the one with the spikey blond Clay Aiken hair style?

Richie is wearing the cowboy hat? Looks more like Jon. Richie wears a black stetson without the rim curving up.

Tico tends to look lively...not like he should be on Paxil (the character does look like Alec, though)

I will say that the one in the upper left corner does look like Jon when he is making a high profile appearance on television with the hair overdone.