To get better picture on Outlook, work with Word object model with MailItem.GetInspector Property (Outlook)
Example
Option Explicit
Public Sub Example()
Dim rng As Range
Dim olApp As Object
Dim Email As Object
Dim Sht As Excel.Worksheet
Dim wdDoc As Word.Document
Set Sht = ActiveWorkbook.Sheets("Dashboard")
Set rng = Sht.Range("B4:L17")
rng.CopyPicture Appearance:=xlScreen, Format:=xlPicture
With Application
.EnableEvents = False
.ScreenUpdating = False
End With
Set olApp = CreateObject("Outlook.Application")
Set Email = olApp.CreateItem(0)
Set wdDoc = Email.GetInspector.WordEditor
With Email
.To = ""
.CC = ""
.BCC = ""
.Subject = ""
.Attachments.Add ActiveWorkbook.FullName
wdDoc.Range.PasteAndFormat Type:=wdChartPicture
' if need setup inlineshapes hight & width
With wdDoc
.InlineShapes(1).Height = 130
End With
.Display
End With
With Application
.EnableEvents = True
.ScreenUpdating = True
End With
Set Email = Nothing
Set olApp = Nothing
End Sub