Don't ya just love opinions? From your essentials list I'd say only Stelios and Loy fit that tag. Smith has a lot of heart but he's a bit too slow for that position, Davis would be a great addition but I doubt we can afford him, likewise Eckersley (we need Stelios and Irvine so keeping Adam might be considered a luxury), Billy has been a great shot stopper but just doesn't inspire confidence, Todd might be alright but his lack of appearances suggests Jack doesn't have him in the essential category.