Many people forget about the existence of urgot because it has low popularity. But also, urgot can't be both tanky and do a lot of damage in the late games. But, there is a build which can be both tanky and ad.
P.S:Support in this guide is not recommended.

Pro: can do tons of damage with combo Noxian Corrosive Charge-> Acid Hunter-> Acid Hunter-> Acid Hunter-> Acid Hunter+ Thunderlord's
Cons:the ability to do this combo, you need to land Noxian Corrosive Charge on enemy champion. which is quite difficult.But, I have some tips for you:
1. To predict the move of the enemy champion.
2. use Noxian Corrosive Charge when the enemy is going to get his cs.

top,mid: Muramana-> Boots of Swiftness-> Death's Dance-> Black Cleaver-> Randuin's Omen-> Spirit Visage
adc: Muramana-> Boots of Swiftness-> Death's Dance-> Black Cleaver-> Maw of Malmortius-> Lord Dominik's Regards
sup: Talisman of Ascension-> Ruby Sightstone-> Black Cleaver-> Boots of Swiftness-> Iceborn Gauntlet-> Randuin's Omen
jungle: Skirmisher's Sabre - Warrior-> Boots of Swiftness-> Iceborn Gauntlet-> Black Cleaver-> Sterak's Gage-> Frozen Mallet

top,mid:
Health=2100+(1300+50)*(1.03)=3490
Mana=1247+1000=2247
Armor=80+(27+60)*(1.05)=171.35 (AD reduction=171/271=63%)
Magic Resist=30+(55)*(1.05)=87.75 (AP reduction=87/187=46%)
Attack Damage=115+{75+50+20+18+4+(2247)*(0.02)}=326
Cooldown reeduction:45%
Movement speed=335+55=390
Q Acid Hunter:130+(0.85)*(326)=407 (1.1s CD)
W Terror Capacitor:220+(0.08)*(2247)=400 (6.6s CD)
E Noxian Corrosive Charge: 295+(0.6)*(211)=421 (6.05s CD)
R Hyper-Kinetic Position Reverser:(33s CD)
ADC:
Health=2100+(350)*(1.03)=2460
Mana=1247+1000=2247
Armor=80+(27)*(1.05)=108 (AD reduction=108/208=51%)
Magic resist=30+(40+27)*(1.05)=100 (AP reduction=100/200=50%)
Attack damage=115+20+50+55+50+75+22+(2247)*(0.02)=431
cooldown reduction=45%
Movement speed=335+55=390
Q Acid Hunter=130+(0.85)*(431)=496 (1.1s CD)
W Terror Capacitor=220+(0.08)*(2247)=400 (6.6s CD)
E Noxian Corrosive Charge= 295+(0.6)*(316)=484 (6.05s CD)
R Hyper-Kinetic Position Reverser=(33s CD)
Sup:
Health=2100+(500+300+500)*(1.03)=3439
Mana=1247+500=1747
Armor=80+(45+65+60+27)*(1.05)=286 (AD reduction=286/386=74%)
Magic Resist=80+(27)*(1.05)=108 (AP reduction=108/208=51%)
Attack Damage=115+22=137
Cooldown reduction:45%
Movement speed=335+55=390
Q Acid Hunter=130+(0.85)*(137)=246 (1.1s CD)
W Terror Capacitor=220+(0.08)*(1747)=359 (6.6s CD)
E Noxian Corrosive Charge=295+(0.6)*(22)=308 (6.05s CD)
R Hyper-Kinetic Position Reverser=(33s CD)

Jungle:
Health=2100+(300+400+700)*(1.03)=3542
Mana=1247+500=1747
Armor=80+(65+27)*(1.05)=176 (AD reduction=176/276=63%)
Magic Resist=30+(27)*(1.05)=58 (AP reduction=58/158=36%)
Attack Damage=(115+60+50+30)*(1.25)=318
Cooldown Reduction=45%
Movement Speed:335+55=390
Q Acid Hunter=130+(0.85)*(318)=400 (1.1s CD)
W Terror Capacitor=220+(0.08)*(1747)=359 (6.6s CD)
E Noxian Corrosive Charge=295+(0.6)*(203)=416 (6.05s CD)
R Hyper-Kinetic Position Reverser=(33s CD)

top, mid,sup: all you need to do is use your Hyper-Kinetic Position Reverser to change the enemy's adc to your side.Tip: you can use your Terror Capacitor while you charge up your Hyper-Kinetic Position Reverser., you can also Flash-> Hyper-Kinetic Position Reverser combo to start the team fight immediately.
Adc: you are the main damage output in your team. you cannot die. you need to put your Noxian Corrosive Charge to the place where the enemy's adc and then Terror Capacitor-> Acid Hunter-> Acid Hunter-> Acid Hunter-> Acid Hunter
jungle: you need to go to the side of the team fight, use your Hyper-Kinetic Position Reverserto change the tankiest and most disgusting champ away and then give them a surprise.

top,mid:adc:sup:jungle:

top,mid,sup.jungle: Flash-> Hyper-Kinetic Position Reverser Predict the enemy champs move, to give them a surprise or chase the champs with low health.
adc: no.

best spells:
top: Teleport, Ghost/ Flash
mid: Clarity, Ghost/ Flash
jungle: Smite, Ghost/ Flash/ Exhaust
adc: Heal, Ghost
sup: Exhaust, Heal/ Flash

top, mid, adc: use your Noxian Corrosive Charge-> Acid Hunter-> Acid Hunter-> Acid Hunter-> Acid Hunter combo to annoy the enemies.
sup:use your Noxian Corrosive Charge when your adc plan to go up.