Excellent script, thanks! I was not seeing the object level perms for users tied to database roles I had created, so I simply added another OR statement to the where clause to get what I was looking for:

SELECT DISTINCT Principal_Name,Login_Name, DatabaseName, ObjectName, ObjectType, PermissionName, state_desc, Grantor

FROM @ObjectPermissions op

WHERE ISNULL(Login_Name, '') like @loginName

OR ISNULL(Principal_Name, '') like @loginName

OR ISNULL(Principal_Name, '') in (SELECT DISTINCT DB_RoleMember

FROM @DBRolePermissions dbrp

WHERE (ISNULL(Login_Name, '') LIKE @loginName

OR ISNULL(Principal_Name, '') LIKE @loginName)

AND dbrp.DatabaseName = op.DatabaseName

AND Permission_Type = 'DATABASE_ROLE')

ORDER BY DatabaseName, Principal_Name, ObjectName, PermissionName