Richard Hadlee for mine. The first man to 400 wickets. 9 10 wicket hauls, 36 5 wicket hauls. Didn't really have a partner in crime either, all the more difficult destroying teams by yourself.
Two sprang instantly to my mind, Hadlee and Marshall. Stats may suggest there are/were better, but these two were awesome. A lot of hype about more recent and current bowlers is wicket count, but frankly they play too many rubbish sides and too many matches so invariably players will score more runs and take more wickets
Marshall did benefit from playing in a great bowling side, but for me it's no surprise windies cricket went downhill after he retired in 1991.
Malcom Marshall
Tests : 81
Wickets : 376
Average : 20.95
SR : 46.77
ER : 2.69
5wi : 22
10wm : 4
Runs : 1810
Average : 18.85
HS : 92
50s : 10
He only ever played Pakistan (20.70), Australia (22.52), India (21.99), England (19.18) and New Zealand (21.53) Find me a modern day bowler who could come close to that consistency against all the best sides, some pretty strong batting sides there to boot and while you can argue he was part of a strong pace attack and gained a boost by that, he also had to compete for wickets within a strong pace attack. Hadlee on the flip side was the spearhead of a weaker attack and therefore, like Murali and others who were solo stars, he would do a lot of bowling and not have as much competition for wickets
Richard Hadlee
Tests : 86
Wickets : 431
Average : 22.30
SR : 50.85
ER : 2.63
5wi : 36
10wm : 9
Runs : 3124
Average : 27.17
HS : 151no
50s : 15
100s : 2
Hadlee's only achilles heel in terms of opposition was Pakistan, he averaged 28.39 in 12 Tests against them. Unlike Marshall, Hadlee played Sri Lanka in six Tests and took 37 wickets at 12.78 at a time when Sri Lanka were finding their way in Test cricket so easy pickings. Take them out of his stats and you have 394 wickets in 80 Tests @ 23.19 and can knock off two 5wis and one 10wm.
Any modern side would have either of those in a heartbeat, just a shame Marshall retired and so tragic he died so relatively young. He could easily have gone on to 100 caps, there was so much more to him than pace, and I reckon his batting average would have improved. Might also have maintained the interest in cricket in West Indies with such a legend.