Frontier team help

[amphoros]

Please can you suggest what i pokemon to add to my frontier team.My team so far consist of:
Miltank
item:shell bell
moves:heal bell
milk drink
curse
body slam

Ampharos
item:leftovers
moves:focus punch
substitute
thunderbolt
thunder wave

I would prefer to use an UU pokemon.Thanks in advance.

 

[Overheat Hothead]

Try
Starmie
Item Leftovers
-Psychic
-Surf
-Icebeam
-Thunderbolt

THats my advise take or leave it

 

[Eszett]

Starmie@Leftovers
Timid, 42 HP/252 SAk/214 Speed
- Surf
- Thunderbolt
- Recover
- Rapid Spin