Since Baseball America published their top 10 list of Giants prospects today, all of the major sources of prospect news have now weighed in on the Giants.  I thought it might be fun to look at all of the lists to compare them a bit and to try to make a consensus list.
 
Baseball America
1. Madison Bumgarner, lhp
2. Buster Posey, c
3. Angel Villalona, 1b
4. Tim Alderson, rhp
5. Nick Noonan, 2b
6. Ehire Adrianza, ss
7. Conor Gillaspie, 3b
8. Rafael Rodriguez, of
9. Scott Barnes, lhp
10. Sergio Romo, rhp

Baseball Prospectus
Five-Star Prospects
1. Madison Bumgarner, LHP
2. Buster Posey, C
3. Angel Villalona, 1B
Four-Star Prospects
4. Tim Alderson, RHP
Three-Star Prospects
5. Rafael Rodriguez, RF
6. Conor Gillaspie, 3B
7. Nick Noonan, 2B
8. Travis Ishikawa, 1B
9. Henry Sosa, RHP
10. Sergio Romo, RHP
Two-Star Prospects
11. Roger Kieschnick, OF

Keith Law
1. Madison Bumgarner, LHP
2. Buster Posey, C
3. Tim Alderson, RHP
4. Angel Villalona, 1B
5. Conor Gillaspie, 3B
6. Henry Sosa, RHP
7. Nick Noonan, 2B
8. Roger Kieschnick,RF
9. Rafael Rodriguez, RF
10. Edwin Quirarte, RHP

John Sickles
1)    Madison Bumgarner, LHP, Grade A
2)    Buster Posey, C, Grade A-
3)    Tim Alderson, RHP, Grade B+
4)    Angel Villalona, 1B, Grade B
5)    Conor Gillaspie, 3B, Grade B-
6)    Henry Sosa, RHP, Grade B-
7)    Nick Noonan, 2B, Grade B-
8)    Travis Ishikawa, 1B, Grade C+
9)    Waldis Joaquin, RHP, Grace C+
10)    Rafael Rodriguez, OF, Grade C+
11)    Jose Casilla, RHP, Grade C+
12)    Clayton Tanner, LHP, Grade C+
13)    Jesse English, LHP, Grade C+
14)    Scott Barnes, LHP, Grade C+
15)    Luis Perdomo, RHP, Grade C+
16)    Ehrie Adrianza, SS, Grade C+
17)    Kelvin Pichardo, RHP, Grade C+
18)    Sergio Romo, RHP, Grade C+
19)    Jesus Guzman, 3B, Grade C+
20)    Joseph Martinez, RHP, Grade C

If you look at all of the lists and try to make a sort of consensus list, there are 7 guys that appear on all 4 lists, and one (Sosa) that appears on 3 of the 4, and after those 8 it gets pretty jumbled. 

1. Madison Bumgarner
2. Buster Posey
3/4. Tim Alderson
3/4. Angel Villalona
5. Conor Gillaspie
6. Nick Noonan
7. Rafael Rodriguez
8. Henry Sosa