The last one is not quite a match because Edward was aged 30 in 1905 when he married Helena Tampler, so his birth year is approx 1875. Also his father is Charles Patrick O'Malley not "James"
Janine
Helena, Honora and and the Edward who died in 1941 are buried at Fawkner Cemetery.
http://www.fcmp.com.au/Helena and Honora are buried at the same location and Edward appears to be in a public grave - a number of unrelated people buried on the same day in the same grave.
There are only three deaths registered in Victoria between 1909 and 1985 for an Edward OMALLEY and two are eliminated by the parents named.
I think you should consider the death of Edward in 1941 with the correct mother named. The information on death certs is only as accurate as the knowledge of the informant. Perhaps Edward had fallen on hard times or there was no one to arrange his burial or he had no assets. I wonder who was the informant. His son in was in New Zealand where he died in 1989.
Death
1989/44502
O'MALLEY Edward Albert Date of Birth 3 January 1910
Edward remarried -
Marriage
OMALLEY Edwd
LUCAS Belinda Elizabeth
1914 Reg#1697
and her death
OMALLEY Belinda
Father Lucas E Mother Unknown UNKNOWN
30 years at Heidelberg 1916 Reg#10503
Australian Electoral Roll
1909
OMALLEY Edward 384 Station Street, North Carlton Tailor
OMALLEY Helena 384 Station Street, North Carlton HD
1914
OMALLEY Edward 384 Station Street, North Carlton Tailor
OMALLEY Belinda Elizabeth 384 Station Street, North Carlton HD
This could be Edward
1919
OMALLEY Edward 158 Cecil Street, North Fitzroy Presser
Cheers
Cando