I'm not sure that I can come up with 10 that I would consider pressure fighters. Marvin Johnson is the first guy that comes to mind but I wouldn't say he was exclusively a pressure fighter. He definitely had other elements as did Vassily Jirov. Jirov more times than not was coming forward and applying pressure but he also could box.
Calzaghe is another guy that deserves mention. His volume punching /high work rate style put pressure on opponents. Hard to beat a guy that will throw that many punches. With that said, he was not exclusively a pressure fighter. When I think of a pressure fighter, I think of a guy moving forward. Calzaghe liked to work angles and turn guys.
Dont know about a top ten but heres some that come to mind not all are pressure fighters but they were all aggressive fighters Manny Pac Marvin Johnson Khaosay Galaxy Srisaket Sor Rungvisai Daniel Zaragoza Paul Williams Joe Calzaghe Jose Luis Ramirez Paulie Ayala Bazooka Limon Cornelius Edwards Adonis Stevenson Giovani Segura
Mmm 10 is a bit hard to make. Lomachenko, Rungvisai for present day, Julio Cesar Vasquez , Jose Luis Ramirez, Tsuyoshi Hamada for past day
Marvin Johnson Khaosai Galaxy Limon Hamsho Bettina Saldivar Ramirez Minter Hagler Julio Cesar Vasquez
Pac Saldivar Hagler Ebihara Tendler Bettina Borkhorsor Watanabe Nazarov Lomachenko Lytell Payakaroon Obviously not all pure pressure fighters but with the ability to do so if they chose. Probably as much of a h2h list tbh as achievements wise.
#10. Joe Calzaghe #09. Hiroyuki Ebihara #08. Vasyl Lomachenko #07. Khaosai Galaxy #06. Jiro Watanabe #05. Venice Borkhorsor #04. Pernell Whitaker #03. Marvin Hagler #02. Manny Pacquiao #01. Vicente Saldivar HMs: Wonjongkam, Nazarov & Pops