If you want the material in stock, then you have to hit in FI posting.
Without FI posting, you can't upload the stock into SAP.
I have a option for you.
Please create the material with Price 0.01. (If already created, then note the current price and change the price to 0.01 from MR21)
Then do the movement type 501 or 561 for initial stock or you can use Physical inventory for material.
When you post the movement or PI , then the account entry will be very small amount.
Then check you stock, If its okay, the change the price for the material (as it was, which you have noted)
Suppose you have a material Z with price 50.00 and have stock 0.00.
Change the price from MR21 as 0.01.
Then post the PI or 501 or 561 movement type for 1000 qty.
Then your account entry will be (1000X0.01) = 10.00...
I hope this is very small amount for your organization.
Then again change the price from 0.01 to 50.00.
Then you can carry on for other movement for material with price 50.00.
In my organization, I have done that around 100 times or may be more.