Botham at his peak was the closest to Gary Sobers as an all-rounder and the best match-winner amongst all great all-rounders.
We have to take the whole career into consideration while talking about players.
Botham was the best batsman of the 4, but I would put him third best for bowling capability.
Botham has amazing first 5 years, on many occasions would single-handedly beat the opposition 11 both with bat and ball, like that Golden Jubilee test.
But similarly, at his peak, Imran was as devastating as any bowler ever has been. Had a bowling average of 14 during 6 years in mid-80s and was the second best batsman in Pakistani team.
Problem with Botham is that he faded away a bit too early or else could have been the best of the 4.
Mentioned it in another thread, his career was divided into 4 distinct parts.
First 10-11 tests. He got a dream start to his career, few centuries in first 10 tests along with lot of 5-fors with the bowling average in mid 10s.
From tests 10-50. Was very good player even during this period, not as good as in first 10 tests but would still be a match winner for his team.
Most of his best performances came during his first 50 tests.
Then from 50-80 tests, he was good as an allrounder, but not good enough to make it into the team as a bowler or a batsman alone. Gave few and occasional match-winning performance.
Last 20 tests, was just a bits and pieces player during this period. Nothing special.
During his first 50 tests, he was on his way to challenge Sobers, but just wasn't the same player during second half of his career.
Now if you compare that with Hadlee or Imran who maintained their standards for much longer than Botham, it would be unfair not to rate them ahead of Botham.
Plus all those 5 performances, no doubt were superb, but none of them is against WI, the best team of his period.
He don't have a single century against them and had worst bowling record against them as compared to his record against other teams.
Rest of the three allrounders have troubled WI, but Botham haven't, so that also takes the shine off his career.
Ex-cricketers do praise him because they recollect his peak period. And during his peak, no doubt he was unstoppable. Players like Kapil who gave consistent performances for longer period of time (130 tests) often gets under-rated because they don't have any such peak periods but on the other hand, they don't have the poor run of form like Botham have during later part of his career. Specially in country like India, where there is no fast bowling culture, it sounds even a bigger achievement. (though I still think Botham was better than Kapil but we should give Kapil his due credit).
Also certainly wrongly left out Sir George Headley,arguably 2nd only to the Don.Also Holding for Garner and Kanhai for Pieterson.
Kanhai somehow slips under the radar in these lists. Holding is must in such lists, led the best bowling attack that has ever been.
Gower has picked Headley though (at 31), though he should be in top 20.