lol draculas new to me. Although I can see how that might come from vampire plecs- generally describing Leporacanthicus... all differing in sizes, but I could take a guess of 7-10"
If you are after a larger pleco... gold nuggets aren't going to be for you, they don't really grow in a captive environment at all... and usually dont get them in much bigger than 6", and more usual to be in the 2-4" range. Can however suggest Scobinancistrus aureatus, the "sunshine" pleco. Reasonably similar and will adapt fine in your tank.
Green phantom could be one of two sizes, either about 7", the other almost 12", depending on the species.