I have only mentioned the ones that I can remember. Looking to my list it appears there have been many strong attacks. I likely missed some. Not sure how to dissect who is the best. Interested to see other thoughts
Pak - Wasim, waqar, shoaib, Razzaq, gul
Pak - Imran, Wasim, Waqar, Aaqib Javed
SA - Donald, pollock, De Villiers, Kallis, Klusener
SA - Steyn, Morkel, Philander, Rabada
Aus - McGrath, Brett lee, Gillespie, Kasprowicz
Aus - Starc, Cummins, Hazlewood, Pattinson
WI - Marshal, Ambrose, Walsh, Bishop
WI - Croft, Roberts, garner, holding
IND - Bumrah, Shami, Ishant, Yadav, Siraj
NZ - Boult, Southee, Jameson, Wagner
ENG - Flintoff, harminson, Hoggard, Jones
ENG - Anderson, Broad, Archer, Wood, Woakes
Pak - Wasim, waqar, shoaib, Razzaq, gul
Pak - Imran, Wasim, Waqar, Aaqib Javed
SA - Donald, pollock, De Villiers, Kallis, Klusener
SA - Steyn, Morkel, Philander, Rabada
Aus - McGrath, Brett lee, Gillespie, Kasprowicz
Aus - Starc, Cummins, Hazlewood, Pattinson
WI - Marshal, Ambrose, Walsh, Bishop
WI - Croft, Roberts, garner, holding
IND - Bumrah, Shami, Ishant, Yadav, Siraj
NZ - Boult, Southee, Jameson, Wagner
ENG - Flintoff, harminson, Hoggard, Jones
ENG - Anderson, Broad, Archer, Wood, Woakes