Tree species advice

Hi, I am after some recommendations for an additional species of native Australian tree to plant alongside 2 x Blackwoods and 3 x red flowing gums ( tube stock )

Background: I have a 25 x 30m space that I would like to turn into a bit of a forest. It’s a good distance from any structures. I would like to plant 3 species of large trees. For 2 of them I have chosen the Blackwood and Red Flowing Gum. I am really stumped on what else to plant.

My initial thought was a couple Grevillia Robustas, but now I’m on the fence as they may not grow fast enough or dense enough in Melbourne?

My location is north west Melbourne. I would like birds to come and visit these trees, obviously it will take many years but I am planning for the future.

Thanks for your help