Sparrow: Some good advice here.
But search PM threads.
As nsfisher says, Carter Hall, Prince Albert and I'll add Sir Walter Raleigh (non-aro) are good without bite.
You can also get Walnut from 4Noggins, which is excellent. I read, I think Pipestud, the other day who says Walnut reminded him of Revelation, Mr. E's tobacco.
C&D's Epiphany is about as close as you are going to get to Einstein's favorite today, in my opinion (take it for what it is worth. I smoked the original in my college days, but honestly can't remember how different Epiphany and Walnut are to Revelation). But, with Epiphany, you have to slow it up to fully enjoy what's there. And there is a lot there.
Roth mixes CH and Walnut for his Wall-Hall, 50-50, which is just really, really good and won't bite at all. Roth also says that a little CH added to a blend will cool it down. I've tried it. He's right, as usual.
I also mix a little CH with Edward G. Robinson (25% CH) and that is quite good and doesn't bite. In fact, EGR alone is very good, doesn't bite, and one of our own Jiminks' very favorites. EGR is a tobacco he saved from the trash heap of history not long ago. You can read it in the threads. It's a wonderful story of dedication to a tobacco blend that was about to become extinct!
Good advice about English blends, too, IMO.
I'd stay clear of aros in the beginning (but, there are definitely some you will want to try down the road). They do tend to burn hot until you get that slow pace going. If you think you are smoking slow, it ain't slow enough, I've found. Believe me, I know scorched tongue syndrome.
That's my 2 cents. Hope this helps. Keep on puffing. Keep on reading. Keep on learning. It is the journey that counts.