Virtually anything bred from multiflora or wichurana root like the weeds they are, using pretty much any method you choose. Both types will layer themselves quickly and easily on damp earth or mulch, which is one reason they make such effective "ground covers". I think you may find types which sucker vigorously are best reproduced via those suckers. In my experience, vigorous suckering often indicates a reluctance to root. Many species and their hybrids fall into that category. Of course, many other factors enter into that equation so your mileage is guaranteed to vary. Kim

Many Teas and Polyanthas and Chinas are easy rooters. Safrano, Angel's Camp Tea, Monsieur Tillier, Madame Lombard, Perle d'Or, Mutabilis, for example. If you want something that will root almost by itself, try Peggy Martin, Petite Pink Scotch, Caldwell Pink, or Marchesa Boccella.

hybrid musks, wichurana climbers (New Dawn and the Barbier ramblers), most species roses, anything with a decent (half?) proportion of China in the lineage, sweet briars (Amy Robsart, Lord Penzance, Greenmantle et al), any of the procumbent roses, especially with wichurana or luciae in the mix, a number of bourbons, especially climbers such as Coupe d'Hebe, Blairii 2.

Tricky - Pimpinellifolias (although they sucker), R.foetida, R.damascena, r.moschata (might try a layer).

I agree with pretty much all of the above, except that I had no trouble rooting R. moschata. 'Cornelia' and 'Alberic Barbier' practically leap out of the pot. Also a lot of massive ramblers, close to species, root readily, which is why my garden is full of Ayrshire and Sempervirens ramblers and other house eaters. 'Spray Cecile Brunner' is very easy, by the way.
Melissa

Great! These are more than enough to try! Another post for "clipping".
Susan

Have to agree that Chinas, teas & polys in general are easiest--at least for me.

All time easiest? Caldwell Pink. It is so no-fail I don't have to use any of the normal rooting procedures on it. Clippings tossed on the compost pile root--literally. Great pass along rose.

Grandmother's Hat is also an easy rose to root. Cuttings just stuck in the ground will strike more often than not.

It suckers mildly, too, but not enough to be a problem.

Rosefolly

Easiest for me have been:
Mrs. Dudley Cross
Nur Mahal
Gruss an Aachen / Pink Gruss an Aachen

I have an excellent, thornless Reine des Violettes. I sure wish I could root that one. It fails every attempt.

Randy