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(You can't use more than 1 GX attack in a game.) x2

Although it has a downside of summoning a token to your opponent's side of the field with ATK/DEF equal to the combined amount of all tributed monsters, Nibiru is still a staple for most decks as it lets you get rid of tough boss monsters that might have targeting and destruction protection

Lord of the Rings Landcyclers This category realistically belongs to Troll of Khazad-dm and Lrien Revealed, though the whole cycle is pretty flexible

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Because it offers efficient attacks and utility in a variety of board states, it is a strong choice for players building toolbox lists or looking for a splashable attacker to patch difficult matchups