Election of 1519
The 1519 election took place on June 28 in Frankfurt. It was one of the most hotly contested elections of the later Empire.
This election followed the death of Emperor Maximilian on January 12, 1519. There was no German contender; the two main candidates were Charles, a Duke of Burgundy who had recently become King of Spain, and Francis I, the King of France. Running as a dark-horse candidate was Henry VIII, King of England.
What about instead of bribing them with money, henry promises the electors more power.
What power would Henry offer them? The princes of the Empire, especially the Electors, were already a law unto themselves a lot of the time and had considerable autonomy. I suspect that if Henry offered them more power they would just laugh in his face at how little he clearly understood the HRE.
The problem here is that people think the HRE elections could be played like modern-day elections, with electoral promises and compromise candidates and so on. The HRE elections were a very introverted thing. They didn't really want an Emperor who had no lands in the Empire, because the one thing the Empire needed to survive was to prevent external forces from getting reasons to interfere. Sure, in this election all of the candidates were kings of foreign powers but of the three only Charles already had a power base within the HRE limits, which made him close enough to an acceptable internal candidate. France was a known meddler in HRE affairs, and England simply had no right to get involved in Germany.
Additionally, once the Electors had whittled down the candidates to the list of who was acceptable, they were only really interested in two things - whether the Emperorship was established in a family, and how much money the candidates would give them. Henry had no money to spend on such things, so he had literally no chance, although as above he wouldn't have even been considered even if he had more money than God, because he still wasn't a German lord.