This may be a fair assessment. I enjoyed him in Man on Fire
of course you did cause he was awesome, but his is still his majority typecast role. analyzing his filmography lends me to believe he has above average performance diversity.
roles where he is not the denzel mass market demanded denzel:
Glory
Malcom X
Philadelphia
Crimson Tide
The Siege
Remember the Titans
Training Day (intentional play flipping the denzel type on ur face)
John Q
Flight
probably fences (haven't seen)
I think his pure volume makes him appear less versatile than he really is
Antwone Fisher