Rounds:
Fender 7150s & 7250s
I currently have a set of 7150 light OEM strings with the additional B string on my Carvin 5. They have plenty of output and mwah. They are long lasting and inexpensive.
D'Addario XLs: A good sounding string set.
Compressed:
GHS Pressurewounds:
These are really good for fretlesses. They have plenty of mwah, and have that flatwound sound to them. A cross between flats and rounds. They are very smooth and are not too abrasive on fretless necks. Kind on frets as well.
Flats:
GHS Precisions: Good old school thumping sound. Last forever, and are smooth to the touch.
Thomastic-Enfield Jazz Flats: Brighter than the normal Flats and very low tension. They are really in a class of their own.
D'Addario Chromes: Kind of in the middle in tone when compared to the GHS and TI strings. A little on the twangy side, although they settle down with age. Probably some of the better feeling and finished strings.
Groundwounds
D'Addario Half Rounds: Good sounding, but were extremely high tensioned. They feel rough and require some playing time to break in and smooth out.
GHS Brite Flats: Similar to the D'Addarios but a little brighter sounding.