I feel like there's some loss of distinction between aggressive and efficient.
If there's a forum glossary page, I've probably missed it. However, I had thought that aggressive means harsh to skin and efficient means effecive at heir removal. Aggressive suggests it's likely to be efficient, but that wouldn't necessarily be true in reverse.
For me, aggressive razors are those that have at least one of:
- poor blade support resulting in lots of blade flex (this is an issue when going ATG and sometimes across as well)
- excessive blade exposure combined with head geometry that doesn't allow to compensate with the angle used.
Thus, for example, the PAA Evolution Aluminus is one of the most aggressive, if not the aggressive, safety razors I have, as it has both. It does allow to compensate for the excess blade exposure by riding the top cap, but going ATG with it is practically always unpleasant. It's also mostly unnecessary, though.
Some razors with little blade exposure really work nearly just as well, but require lots of glide but a thinner lather, as flowthrough often isn't that great. Using just water and shave oil usually works a treat. Also angling the razor head so it slices rather than chops.
More on topic, the razors I found give me a good shave on a week's worth of growth while being gentle:
- Parker OC style head (found on e.g. Parker 24C and 26C, also Maggard's v2 OC head)
- iKon 101 and 103
- Rocnel SE-P OC (and CC, but the OC is more efficient)
- MMOC (has a bit of blade chatter ATG, though)
- PAA Ascension
- Occam's razor
- The Leaf (with more frequent rinsing)
Perhaps another thing to note is that, as mentioned by others earlier, just swishing the razor head in a bowl of water or rinsing it is probably the surest way of preventing clogging.
You could also use a shavette with little blade exposure (Parker has a few models that are fairly inexpensive, too) to go with the growth for the first pass or use something like the Philips OneBlade to mow most of the hair off in one pass (still needs rinsing if you were to use it with soap) and finish off with a safety razor.
You could also do a WTG pass every 2-3 days, it would take probably less than 5 minutes including cleaning the razor and brush and would make things easier.