I believe that the main playable goat in Goat Simulator (officially named Pilgor) has a Ryu Number of 3? The route I've taken for this is the official Payday crossover DLC for Goat Simulator (not to be confused with the Goat Simulator crossover DLC for Payday 2, which includes many generic goats that look identical to Pilgor but can't really be considered Pilgor specifically), where 4 of the playable characters from Payday 2 make appearances on the map, along with the goat specifically identified as Pilgor. (She is referred to by name in this instance, so it is not a generic goat with the same model like the goats that appear in PD2.) This can then go through Bill Overbeck's appearance in Payday 2 and then the Minecraft skin. (Apologies if I've miscounted or if there's a shorter route available)