I would really prefer for us to sign Jordan Rhodes. He's consistently scored goals in the Championship for around the last 4 years with an overall record of something like 89 goals in his last 187 Championship games. He has a proven rapport of playing alongside Gestede too and with McCormack playing in behind them that would be a front three that netted an accumulative 58 goals from a combined 128 appearances in the 2014-2015 season.
Hernandez and Kodjia have not scored as prolifically as Rhodes and Wells has a 1 in 3 rate in recent seasons. Assombalonga has a good strike rate but I watched his goals compilation from the season before last and it involved a lot of tap-ins. Not being funny but Villa are not that creative a team and we need someone who can be a focal point striker and I think Rhodes will be just that. Also, he is Scottish so that might help him to build a rapport with McCormack too. Add that to his previous playing partnership with Gestede and I think those three would reap havoc in this league. In fact, we could probably get Wells and Rhodes for the money being mentioned for Hernandez. Imagine a rotating front four of McCormack, Gestede, Wells and Rhodes? That would rip teams apart!
I think Rhodes could help us play two styles - 3-4-1-3 at home - in order to attack teams:
--------------------------Gollini------------------------
-------Elphick--------Chester-----Baker----------
De Laet------Jedinak------Tshibola-----Amavi
-------------------------Grealish---------------------
McCormack---Gestede/Rhodes----Wells/Rhodes
And away from home we could play a more solid looking 4-3-1-2:
--------------------------Gollini------------------------
De Laet------Elphick------Chester-----Cissokho
-------Tshibola--------Jedinak-------Grealish-----
----------------------McCormack----------------------
-------Gestede/Rhodes--------Wells/Rhodes----
I think any combination of those front four would see us looking pretty potent in front of goal.