Do Villa actually have enough players to cover the pitch?

I'm going to be writing an article soon on the different ways we might see Aston Villa line up this season. In preparation for that, I was cobbling together a little depth chart for my own reference. Then I did some quick searching and realized I couldn't find one online for Villa as they stand, so I figured I might as well publish this in case anyone else is looking.

One quick note: I've listed a few players in positions where I absolutely would not want to see them (Chris Herd at right back, for instance) but where they could likely be called upon to cover if a great need arose. You'll also notice that those players are largely towards the bottoms of their sections. So please, point out any major errors I've made in the comments, but keep in mind the fact that if they're at the bottom of the section, they are there strictly as depth usually.

Goalkeepers

• Brad Guzan
• Jed Steer
• Shay Given

Defenders

Left backs

• Joe Bennett
• Antonio Luna
• Kieran Richardson
• Ciaran Clark
• Nathan Baker
• Enda Stevens

Centre backs

• Ron Vlaar
• Jores Okore
• Philippe Senderos
• Nathan Baker
• Ciaran Clark
• Chris Herd
• Matthew Lowton
• Janoi Donacien

Right backs

• Leandro Bacuna
• Matthew Lowton
• Alan Hutton
• Chris Herd

Midfielders

Left midfield/wing

• Kieran Richardson
• Jack Grealish
• Joe Cole
• Charles N'Zogbia
• Aleksandar Tonev

Central midfield

• Fabian Delph
• Ashley Westwood
• Joe Cole
• Karim El Ahmadi
• Gary Gardner
• Aleksandar Tonev
• Charles N'Zogbia
• Chris Herd

Right midfield/wing

• Jack Grealish
• Joe Cole
• Leandro Bacuna
• Karim El Ahmadi
• Charles N'Zogbia
• Aleksandar Tonev

Attack

• Andi Weimann
• Libor Kozak
• Gabby Agbonlahor
• Darren Bent
• Callum Robinson
• Graham Burke
• Christian Benteke (injured)