log periodic seems to be the way to go, but there are 000's out there
Well, not exactly 000's, but I get your confusion.
Logs versus other types of aerials
As a family type, Log Periodic aerials have a fairly flat gain curve. This means that they provide about the same signal strength whether the channels being broadcast are at the bottom or the middle or the top of the frequency range. Other aerial types (so-called wideband high-gain aerials) have a gain curve that favours the mid to upper-end of the frequency range. They're not a good choice if some or all of your local frequencies are in the bottom 1/3rd of the band.
If there's an aerial type that you could think of as fairly universal, then a Log is probably the closest thing.
The different types of Logs
Log Periodics have been around for a long time, but the general public (and quite a few in the aerial trade) haven't really understood them. The age is important because it pre-dates the changes in the frequency bands due to the sell-off of the higher bands for 4G. That means there are Log Periodics that cover channels 21 to 68, and there are Logs designed to cover the shorter post-4G channel range from 21 to 60.
A standard Log Periodic (A.K.A. DM Log) and a Log 40 both do 21-68. That's okay so long as there's no 4G interference in the area, or if there is, then they're used with a 4G filter that blocks it.
A Log 36 does channels 21-60. This is a shorter range. It has very little reception capability above ch60, so it's unlikely to be affected by 4G unless there are extreme circumstances. Since a Log 36 concentrates its reception on a smaller channel band, it generates a little more signal power than the DM Log or standard Log.
For DIY installs, if you want a one-hit solution, then a
36 element Log Periodic aerial covering channels 21-60 will generally do the trick. Avoid any of the short stubby Logs you might see advertised. They're for places where space is at an absolute premium and they trade off signal power for their small size.
