I was going by this...
Only creatures I saw that tap for one Dmg is
But here's the rest for further reference...
Tap for 2 damage:
Aven Archer
Color= White Type= Creature - Bird Soldier Cost= 3WW OD(U)
Text (OD): 2/2, Flying. ; {2}{W},{Tap}: ~this~ deals 2 damage to target attacking or blocking creature.
Chainflinger
Color= Red Type= Creature - Beast Cost= 3R OD(C)
Text (OD): 2/2. ; {1}{R},{Tap}: ~this~ deals 1 damage to target creature or player. ; Threshold - {2}{R},{Tap}: ~this~ deals 2 damage to target creature or player. (Play this ability only if seven or more cards are in your graveyard.)
Dwarven Sea Clan
Color= Red Type= Creature - Dwarf Cost= 2R HL(U1)
Text (HL+errata): 1/1. ; {Tap}: ~this~ deals 2 damage to target attacking or blocking creature whose controller controls an island. Play this ability only during the end of combat step. [Oracle 2001/05/02]
Heavy Ballista
Color= White Type= Creature - Soldier Cost= 3W WL(C)/6(U)/7(U)
Text (WL/6th/7th): 2/3. ; {Tap}: ~this~ deals 2 damage to target attacking or blocking creature.
Keeper of the Flame
Color= Red Type= Creature - Wizard Cost= RR EX(U)
Text (EX+errata): 1/2. ; {R},{Tap}: ~this~ deals 2 damage to target opponent with more life than you. [Oracle 2001/05/02]
Nightscape Master
Color= Black Type= Creature - Wizard Cost= 2BB IN(R)
Text (IN): 2/2. ; {U}{U},{Tap}: Return target creature to its owner's hand. ; {R}{R},{Tap}: ~this~ deals 2 damage to target creature.
Orcish Artillery
Color= Red Type= Creature - Orc Cost= 1RR A(U)/B(U)/U(U)/R(U)/4(U)/5(U)/6(U)/7(U)
Text (4th/5th/6th/7th): 1/3 ; {Tap}: ~this~ deals 2 damage to target creature or player and 3 damage to you.
Orcish Cannoneers
Color= Red Type= Creature - Orc Cost= 1RR IA(U)
Text (IA): 1/3. ; {Tap}: ~this~ deals 2 damage to target creature or player and 3 damage to you.
Psionic Entity
Color= Blue Type= Creature - Entity Cost= 4U LG(R)/4(R)
Text (4th): 2/2. ; {Tap}: ~this~ deals 2 damage to target creature or player and 3 damage to itself.
Reveka, Wizard Savant
Color= Blue Type= Creature - Legend Cost= 2UU HL(U1)
Text (HL+errata): 0/1. ; {Tap}: ~this~ deals 2 damage to target creature or player and doesn't untap during your next untap step. [Oracle 1999/07/23]
Shauku's Minion
Color= Multi Type= Creature - Minion Cost= 1BR MI(U)
Text (MI): 2/2. ; {B}{R},{Tap}: ~this~ deals 2 damage to target white creature.
Slingshot Goblin
Color= Red Type= Creature - Goblin Cost= 2R PS(C)
Text (PS): 2/2. ; {R},{Tap}: ~this~ deals 2 damage to target blue creature.
Storm Spirit
Color= Multi Type= Creature - Spirit Cost= 3WUG IA(R)
Text (IA): 3/3, Flying. ; {Tap}: ~this~ deals 2 damage to target creature.
Thornscape Master
Color= Green Type= Creature - Wizard Cost= 2GG IN(R)
Text (IN): 2/2. ; {R}{R},{Tap}: ~this~ deals 2 damage to target creature. ; {W}{W},{Tap}: Target creature gains protection from the color of your choice until end of turn.
Tor Wauki
Color= Multi Type= Creature - Legend Cost= 2BBR LG(U1)/CH(C1)
Text (LG/CH): 3/3. ; {Tap}: ~this~ deals 2 damage to target attacking or blocking creature.
Tap for 3 damage:
Elite Archers
Color= White Type= Creature - Soldier Cost= 5W US(R)/7(R)
Text (US/7th): 3/3. ; {Tap}: ~this~ deals 3 damage to target attacking or blocking creature.
Kamahl, Pit Fighter
Color= Red Type= Creature - Barbarian Legend Cost= 4RR OD(R)
Text (OD): 6/1, Haste. ; {Tap}: ~this~ deals 3 damage to target creature or player.
Lady Caleria
Color= Multi Type= Creature - Legend Cost= 3WWGG LG(R)
Text (LG+errata): 3/6. ; {Tap}: ~this~ deals 3 damage to target attacking or blocking creature. [Oracle 1999/09/03]
tap for 4 damage:
Femeref Archers
Color= Green Type= Creature - Soldier Cost= 2G MI(U)/6(U)/7(U)
Text (MI/6th/7th): 2/2. ; {Tap}: ~this~ deals 4 damage to target attacking creature with flying
tap for 5 damage:
Venomspout Brackus
Color= Green Type= Creature - Beast Cost= 6G ON(U)
Text (ON): 5/5. ; {1}{G},{Tap}: ~this~ deals 5 damage to target attacking or blocking creature with flying. ; Morph {3}{G}{G}.
And that's about it...
