Not if the white object or jeans had been put on top of the cushions and blood continued to drip from his wounds. They later move them to be around the scuttle.
Once again, your theory requires a sequence of invisible actions that leave no trace., you’d see saturation, soak-through, or transfer, on the pillows, mat, or surrounding floor. You don’t. The blood pattern doesn’t support it. Again Blood fixes the position, Neville was in and it fixes it at the coal scuttle, and not the pillows or in front of the Aga, there’s zero evidence of blood pooling in front of the Aga, there’s a mountain of evidence it was at the Coal Scuttle, pictures, stain marks, police statements, Dr Craig’s confirmation Etc.