NPN Transistor brothers (or cousins)

[zener]

2N5089, 2N5088, 2N3904, (How about 2N2222?)

What other transistors can be added to the list? What could yield the most gain?

Thanks.

[Paul Perry (Frostwave)]

According to my transistor book, those four have gain of 400, 300, 100, 100 respectively. If gain is what you want, perhaps BC549 would do as well.