Yeah I know the feeling man, I'm still shedding atm and it is really harsh.
I'm on a very mild finasteride dose, just to take the edge off my DHT really without cutting it harshly. I'm like you, I don't want to do any damage or risk sides. 0.25mg every couple of days and the occasional beta-sitosterol/saw palmetto is unlikely to kill me! heh
If you want an internal regimen that's a bit safer, then maybe curcumin, resveratrol, lignans and (mild) saw palmetto? That will knock your DHT down but only a tad, and will also reduce inflammation and inhibit the apoptotic process by which the hair is harmed at at least 2 other points (other than the presence of the DHT itself)
Gotu Kola is also good as it increases capillary blood flow. IMO a good, non-inflammatory diet helps, and a multivit/omega 3
Other than that, you're on topical treatments. Jacob seems to have put together a good combo, as well as probably many other members. I think Spectral DNC + a 2% keto shampoo is probably adequate (and yeah Spectral should work on the hairline at least to some extent too), but there are more options if you want to add more still
People also swear by stuff like xandrox, but Spectral is my personal choice I think!