There's a fair amount of quiescent current in a 74LSxx series IC--the output stages between most parts is the same; i.e., the output stage of a 74LS00 is identical to that of a 74LS30.

If the asymmetrical output characteristics bother you, you can always use a CMOS (74HC30 or 74HCT30), which go nearly from rail to rail on the output. HCT has a lower input "1" threshold than HC (usually 1/2 of Vcc) but is otherwise identical.

The key difference between CMOS and bipolar TTL logic is that one is voltage-controlled, while the other is current-controlled. That's why CMOS fanin is essentially limited by capacitance, versus input current for TTL.