Wowee I haven't played silver in nearly 6 years!
Here's my top 6 team (from memory)
Mewtwo
HELD ITEM: equivalent of chesto berry
HP: 413
ATK: 312
DEF: 276
SP.ATK: 404
SP.DEF: 278
SPD: 338
1. Psychic
2. Thunderbolt
3. Ice Beam
4. Rest
Lugia
Held Item: Sharp beak
HP: 402
ATK: 250
DEF: 342
SP.ATK: 260
SP.DEF: 404
SPD: 317
Ho-oh
Held Item: Charcoal
HP: 385
ATK: 345
DEF: 260
SP.ATK: 316
SP.DEF: 404
SPD: 241
Tyranitar
Held Item: Blackglasses
HP: 385
ATK: 352
DEF: 306
SP.ATK: 286
SP.DEF: 296
SPD: 221
1. Crunch
2. Earthquake
3. Fire Blast
4. Hyper Beam
Gengar
Held item: Twistedspoon
HP: 295
ATK: negligible
DEF: 220
SP.ATK: 354
SP.DEF: 244
SPD: 300
1. Confuse Ray
2. Thunderbolt
3. Hypnosis
4. Dream Eater
Scizor
Held Item: Pink Bow
HP: 311
ATK: 356
DEF: 250
SP.ATK: 173
SP.DEF: 220
SPD: 206
1. Slash
2. Swords Dance
3. Steel Wing
4. Hyper Beam
Thats off the top off my head. I used to use Ampharos, Raikou, Dragonite, a different Tyranitar, Mewtwo and Lugia. I used this team to compete in Pokemon Stadium 2 gyms/cups.
For RBY and Pokemon Stadium, I used Mewtwo, Moltres, Zapdos, Dragonite, Lapras and Electrode.