There isn't really a specific person who had the idea of a new model army in the civil war. The idea initially came from Parliament themselves, although it is not recorded who (specifically) came up with the grand idea. So, to conclude, there is not really an answer to your valid question although Parliament could be a broader answer to it.
Hope that helped you as I had to a similar question for my Year 8 History Homework,
Megan :)
The NFL credits its formation to Jim Thorpe and Leo Lyons who met in 1917.
It is Jack's idea to use Piggy's glasses to start the fire. Jack steals the glasses right off of Piggy's face without even asking him first.
Odysseus got the idea.
it was winston churchills idea
The idea of that line was thought to have been originated by the actor Deforest Kelly who played Dr Leonard 'Bones' McCoy
Pericles had the idea to build the Parthenon.
paul reveres idea
can you give idea for a model on hazards
John Walker
poobean
Roger Sherman
Woodrow Wilson