How would you present these Valuation methodologies to a company or its investors?

Usually you use a “football field” chart where you show the valuation range implied by each methodology. You always show a range rather than one specific number.

As an example, see page 10 of this document (a Valuation done by Credit Suisse for the Leveraged Buyout of Sungard Data Systems in 2005):

http://edgar.sec.gov/Archives/edgar/data/789388/000119312505074184/dex99c2.htm