Other than Special Forces and Rangers, what are some other “high speed” and high specialty jobs in the Army?

Some of the Army's lesser known or highly specialized MOSs are -
Divers
Counter Intelligence Agents
Human Intelligence Specialist
Explosive Ordnance Disposal
Watercraft Operator

Not MOS specific but mostly Infantry
Old Guard
Army Marksmanship Program

I was Army Warrant Officer Candidate to rotary wing flight school. 1969 so "old school" lol. Approximately 320 started the class, 120 graduated. It was very demanding physically, emotionally and academically. Graduated in top 10% so was able to go the Cobra transition. Flew 750 missions in South Viet Nam and neighboring countries. Army helicopter pilots of today are even more highly trained and the aircraft more complex. Then and now Army helicopter pilots likely qualify as high speed and high specialty.

Most of the “high speed” (aka cool) gigs are invitation only. In reading the comments I note spending time as a Ranger (at Bat) and perhaps going SF. If you possess unique skills someone will invite you at some point. That said, having been a product of Division, the 82d is a hell of a lot of fun in and of itself.

See if you can just make it with a light infantry unit first before talking SF and Ranger... just my recommendation.

Depends on who you ask, but 13F is a decent candidate.

Flight Medic

As far as actual jobs, not a ton. However, there are a ton of units and assignments you can do, depending on your MOS.

If you have a desire for the special forces I say go for it. You never know until you try. My brother was a pot smoking kid in high school, joined the Army in the 80's, worked as an MP and was going to get out after 4 yrs. He was introduced to the idea of trying out for the Green Berets. He did it and retired as a WO-3. His secret to making it? He refused to quit.

I do not care about any proclamations of greatness. Want matters is covert results. I love the Naval Forces as a Marine. Both Bn and Force Recon, and the Navy Seals. I question the media and their enabling media hype of the Navy Seals. Now we have Marine Raiders. I will wait until I see what the results of bringing the Raiders back to life. The late Tom Clifford a veteran of the WW2 South Pacific and past president of the University of North Dakota was a Marine Raider. President Clifford was one class act. God rest his soul. For me the US Army SF are also a special. I love and respect their humility as I see it.

Many job are high specialty, they just work behind the scenes, getting info to the front line. Signal and intelligence were my specialities. Special Forces and Rangers wouldn'tt know where to go and what to do without those without these two MOS'.