Horford and West are among the best defenders and floor spacers in their position. Faried isn't on their level, well not yet.
16-24 ft. shooting% (2013-14)
West .520%
Horford .496%
Faried .245%
Other bigs you mentioned.
Larry Sanders - rim protector w/ a huge wingspan. Had one of the worst seasons by someone who just signed a new contract but still highly coveted.
Nikola Pekovic - Not a floor spacer or rim protector. Contract may be difficult to move if the Wolves decide to invest on Dieng
Omer Asik - Rim protector. Backloaded but good contract
Andrea Bargnani - back end of a bad contract.
Derrick Favors - too early to tell. Overpaid for his size and potential. But unlike Faried, he's not a 6'6 PF.
Advanced stats on Faried last season was already comparable to both Horford's & West's careers.
Faried has a PER of 19.8 last season, TS% of .573, TRB% of 16.9 , ORtg of 116, DRtg of 104, 80 games played.... compared to...
Horford career PER of 18.7, TS% of .572, TRB% of 16.3, ORtg of 114, DRtg of 104, 29 games played last season
West career PER of 18.9, TS% of .542, TRB% of 13.1, ORtg of 109, DRtg of 104, 80 games played last season
Larry Sanders - Too one-dimensional. PER of 14.0, TS% of .478 which is awful for a big, ORtg of 101, DRtg of 100
Nikola Pekovic - TRB% of 15.3, BLK% of 1.1 despite being 7ft (Faried is 2.3)
Omer Asik - PER of 14.0, ORtg of 105, DRtg of 100
Andrea Bargnani - PER of 14.4, TRB% of 9.5
Derrick Favors - PER 17.1, ORtg of 106, DRtg of 105