Fluridil is a good option to consider.
It dries in half a minute, has no smell and no color.
3 things to consider:
1.It's 96% alcohol so it can be drying/irateting for some people scalp.
2.It decompose in water (safety mechanizm, so it won't have
systemic antiandrogenetic activity if absorbed into the blood), so I
guess you have to be carefull not to sweat or get wet from rain in the
first few hours after application.
3. Pretty expensive.
about effectivness: I'm using it a little more than two months, so far I think it's working, but still to early to really know. I'll give updates.
good luck whatever you choose, seems like you have very strong regimen anyway.